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Electronic Fuel Injection Throttle Kits
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Drive By Wire Actuator Assembly for Individual Throttle Body (ITB) Systems
The Rennen by JSR Drive By Wire (DBW) Actuator Assembly is a precision-engineered component designed specifically for use with Rennen by JSR Individual Throttle Body (ITB) conversions. This advanced actuator assembly replaces traditional mechanical throttle linkage systems with modern electronic throttle control, delivering precise throttle operation, improved drivability and seamless integration with modern engine management systems.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
As performance engine builds continue to embrace electronic fuel injection and advanced ECU technology, drive-by-wire systems have become increasingly popular due to their ability to provide highly accurate throttle control, programmable throttle mapping and enhanced engine management capabilities.
For Porsche enthusiasts upgrading to a Rennen by JSR ITB system, the DBW actuator assembly provides a professional solution that combines modern control technology with the exhilarating throttle response and induction characteristics of individual throttle bodies.
What Does a Drive By Wire Actuator Assembly Do?
A Drive By Wire actuator electronically controls throttle opening based on driver input from the accelerator pedal rather than using a traditional cable-operated throttle linkage.
The actuator receives commands from the ECU and precisely controls throttle position to optimise engine response and performance.
Key functions include:
- Electronic throttle control
- Precise throttle positioning
- ECU integration
- Programmable throttle mapping
- Improved throttle response
- Enhanced engine management functionality
- Consistent throttle operation
This technology allows greater flexibility in engine calibration while improving overall drivability.
Why Is an ITB Upgrade So Appealing?
Individual Throttle Body systems remain one of the most desirable naturally aspirated performance upgrades available for Porsche engines.
Unlike conventional intake systems, each cylinder receives airflow through its own dedicated throttle body, reducing intake restrictions and dramatically improving responsiveness.
Benefits of a Rennen by JSR ITB upgrade include:
- Instant throttle response
- Improved airflow efficiency
- Enhanced engine breathing
- Increased performance potential
- Greater tuning flexibility
- Improved driver engagement
- Distinctive induction sound
- Motorsport-inspired driving experience
The combination of ITBs and Drive By Wire technology delivers modern engine control while retaining the raw character and responsiveness enthusiasts seek.
Why Install a Drive By Wire Actuator?
Modern electronic throttle control provides significant advantages over traditional cable-operated systems.
Benefits include:
- More accurate throttle control
- Smooth throttle transitions
- Customisable throttle maps
- Improved ECU integration
- Enhanced drivability
- Simplified installation in EFI conversions
- Compatibility with advanced engine management features
- Improved reliability and consistency
For performance builds, a DBW actuator can unlock advanced tuning strategies that are difficult to achieve with conventional throttle linkages.
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Fits:
Porsche 911 2.0ltr - 1965 to 1968
Porsche 911 2.2ltr - 1969 to 1971
Porsche 911 2.4ltr - 1974 to 1977
Porsche 911 3.0ltr - 1978 to 1983
Description
The MD35 ECU is a programmable engine management system that can be used as an independent Engine Control Unit (ECU) for virtually all types of gasoline engines, or in combination with a standard engine management system.
This system is equipped with a 38 channel data logging feature to enable professional style development of your vehicle.
The MD35 can take over the standard injection/ignition at any desired engine speed, boost pressure or throttle valve position.
The MA5 works with all KMS accessories & components. Activate for instance one of the key features, a complete self-learning air to fuel ratio control (lambda control) with the KMS Uego CAN controller set to. Precise ignition and air/fuel mixture control will lead to excellent drivability, performance and low fuel consumption.
- Controls up to 10 cylinders
- USB C communication
- Inputs protected up to 50V
- Water-resistant Aluminum housing
- Engine diagnostics
- CAN-bus
- Shortcut protected outputs
- Idle control
- RPM limiter (launch control, pit limiter)
- ALS (anti lag system)
- Boost control
- 2 different engine load inputs
- 1 configurable analog input
- 1 selectable digital input
- 3 auxiliary
- Weight 333g
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Fits:
Porsche 911 2.0ltr - 1965 to 1968
Porsche 911 2.2ltr - 1969 to 1971
Porsche 911 2.4ltr - 1974 to 1977
Porsche 911 3.0ltr - 1978 to 1983
Description
The MD35 ECU is a programmable engine management system that can be used as an independent Engine Control Unit (ECU) for virtually all types of gasoline engines, or in combination with a standard engine management system.
This system is equipped with a 38 channel data logging feature to enable professional style development of your vehicle.
The MD35 can take over the standard injection/ignition at any desired engine speed, boost pressure or throttle valve position.
A complete self learning air to fuel ratio control (lambda control) is one of the key features of the KMS MD35 ECU. The lambda control is used in combination with the KMS Uego CAN controller set. Precise ignition and air/fuel mixture control will lead to excellent drivability, performance and low fuel consumption.
Included within the KMS MD35 ECU package is the main connector, communication cable and wiring diagram. All necessary software, firmware and manuals are available on our website. The KMS MD35 wiring loom set is sold separately.
Features:
• Complete engine management system up to 12 cylinders
• Dual self-learning lambda control in combination with KMS UEGO CAN controllers
• Odd firing angles
• Direct fire in combination with cam-sensor
• Inductive / Hall crank trigger
• Staged / Banked injection
• Map selector
• Engine diagnostics
• Shortcut protected outputs
• 38 channel 4Mb data logging
• Dual processor technology
• Water resistant
• Connector with gold-plated pins
• USB interface
• CAN communication (used for extra in-/outputs, KMS CAN display, etc.)
• 2 engine load sensors
• 3 analog inputs (2nd lambda, gearbox position, G-force sensor, EGT, etc.)
• 3 auxiliary outputs (Shift light, water-injection, cooling fan, etc.)
• Pit lane and speed limiter (variable)
• RPM limiter
• Anti Lag System (variable)
• Powershift (separate delay and cut-off time for each gear)
• Boost control (gear, speed and time-dependent)
• Launch control (variable, separate time delay possible)
• Idle control
• Speed inputs from external KMS speed sensor >CAN converter 4-channel
• Traction control
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Patented technology that helps to increase air flow dramatically thus minimising air flow separation and reduces turbulence, resulting in higher volumetric efficiency.
This pristine technology with Knife-edged butterflies has improved inlet airflow and performance significantly. With the individual Throttle blades very close to the inlet valves, the engine and Throttle response are vastly improved. Along with this, we have also found an impressive increase in Horsepower, Torque, Driveability, and an incredible mechanical soundtrack.
Throttle Bodies come fully assembled and ready to bolt directly to the Cylinder Heads, with the following parts included:
• Anodised Aerospace Grade 6082/T6 Billet Aluminium "Shaft-less" Individual Throttle Bodies.
• Anodised Aluminium Inlets/Extensions suitable for flatdeck & ducktail models.
• Aluminium Ram Pipes & Assembly Tool.
• Throttle Position Sensor (TPS).
• Billet Aluminium Fuel Rails, Including PICO 377cc Fuel Injectors.
• Thermal Insulation Gaskets.
• Throttle Linkage System which connects directly to the existing OEM cable pick-ups.
you will need an EFI Installation & control kit which is not included
**please note
Race Mesh Ram Pipe Installation Kit is not included
this is extra product code 102-101-00086-01 The contents of these kits may vary, from the images provided
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
102-102-00239-01
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Fits:
Porsche 911 2.0ltr - 1965 to 1968
Porsche 911 2.2ltr - 1969 to 1971
Porsche 911 2.4ltr - 1974 to 1977
Porsche 911 3.0ltr - 1978 to 1983
Description
The Electronic Throttle Control (ETC) is a powerful and reliable system for the control of electronic throttle valves in various applications. It enables users to control electronic throttle valves, stand-alone or in cooperation with an engine control unit. The system uses a powerful PID algorithm to ensure that the electronic throttle valve will be reacting, under all circumstances, within a few milliseconds.
It allows users to get the full potential from the electronic throttle valve with functions like RPM limiter, Anti Lag (ALS) control, launch control, pedal response, throttle blip and many more. The KMS ETC module has an extensive automatic calibration process which enables a reliable use of the system within a few minutes.
Included within the KMS ETC package is a wiring loom main connector, communication cable and wiring diagram.
Features:
- Suitable for all electronic throttle valves
- Stand-alone use or in cooperation with other ECU’s
- CAN-communication with KMS ECU
- Water resistant
- Powerful PID algorithm
- User-friendly software
- Automatic calibration
- Static RPM (idle) control
- Anti Lag (ALS) control
- Launch control
- Pit lane speed limiter
- RPM limiter
- Throttle valve characteristics mapping
- Throttle-blip for downshift
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Fits:
Porsche 911 2.0ltr - 1965 to 1968
Porsche 911 2.2ltr - 1969 to 1971
Sizes Porsche 911 intake manifolds
Carburetor/Bosch MFI Ø32mm engine side - Ø40mm ITB side. Recommended for early 2.0ltr / 2.2ltr engines
Injectors options that can be used - 260cc / 300cc / 380cc / 420cc / 480cc / 520cc
This is a direct replacement kit for replacing carburetors while keeping the OEM look in your engine bay.
The intake manifolds and riser plates are manufactured out of a single piece of 6082 aluminum and come in 2 styles. These differ in design due to the shape of the mounting flange for the cylinder head. The intake manifold can be used as replacement parts for the OEM part when damaged or has to be replaced*.
The ITBs are manufactured out of cast aluminum, whist the fuel rails are made out of aluminum 6060 extrusion profile and come with AN6 ORB connection for the fuel lines. The direct mount fuel pressure regulator is directly mounted to the fuel rails, so in this case you don’t need to drill additional holes in the engine bay for mounting a fuel pressure regulator.
The throttle linkage and all mounting hardware is made from stainless steel and the pivoting point of the throttle linkage is a ball and socket design for smooth operation. The levers allow you to adjust and finetune mechanical movement of the ITBs
The dimensions of the assembly are the same as the OEM carburetor setup and the riser plate comes with same mounting holes as the OEM carburetors, in this way you are able to use the OEM air filter box and OEM airhorns. Also the riser plates come with mounting options for an air intake temperature sensor, this is nicely hidden away between the ITBs. The diameter for the ITBs in the riser plate is 45mm. There is also an option for using airhorns, In this case you don’t need the riser plates.
The crank sensor and trigger wheel kit are additional and this type of kit is needed when using ITBs like these. Besides switching to ITBs you will need a stand alone ECU to get the fuel injection to work. Our kit only works with engines like the 3.0ltr that came with a “ big distributor”. You can leave the distributor or you can remove this unit when you are going to use a discoil type of ignition. In for case an adapter is included in the crank sensor kit. The pulley comes in 2 dimensions to choose from, a Ø116mm pulley and Ø126,5mm pulley.
Fuel injectors, fuel lines, standalone ECU, wiring harness are NOT included in the kit.
*In case of using as a replacement part 3 mounting holes for the carburetors or ITBs need to be re thread with a timesert or helicoil. Otherwise it is impossible to mount a threaded stud.
Kit Includes
2 x Full billet, hard anodised intake manifolds
6 x ITB complete with lever assembly
6 x Airhorns 45mmØx30mm
2 x Fuel rail with mounting hardware
1 x Throttle linkage with 2 throttle connection rods
1 x Direct mount fuel pressure regulator
2 x Riser plates with 1 air temperature sensor (for use with OEM air filter box)
1 x Crank sensor and trigger wheel kit (optional)
All needed gaskets and mounting hardware.
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 2.7ltr - 1974 - 1977
Sizes Porsche 911 intake manifolds
Carburetor/Bosch MFI Ø34mm engine side - Ø40mm ITB side. Recommended for early 2.7ltr engines
Injectors options that can be used - 260cc / 300cc / 380cc / 420cc / 480cc / 520cc
This is a direct replacement kit for replacing carburetors while keeping the OEM look in your engine bay.
The intake manifolds and riser plates are manufactured out of a single piece of 6082 aluminum and come in 2 styles. These differ in design due to the shape of the mounting flange for the cylinder head. The intake manifold can be used as replacement parts for the OEM part when damaged or has to be replaced*.
The ITBs are manufactured out of cast aluminum, whist the fuel rails are made out of aluminum 6060 extrusion profile and come with AN6 ORB connection for the fuel lines. The direct mount fuel pressure regulator is directly mounted to the fuel rails, so in this case you don’t need to drill additional holes in the engine bay for mounting a fuel pressure regulator.
The throttle linkage and all mounting hardware is made from stainless steel and the pivoting point of the throttle linkage is a ball and socket design for smooth operation. The levers allow you to adjust and finetune mechanical movement of the ITBs
The dimensions of the assembly are the same as the OEM carburetor setup and the riser plate comes with same mounting holes as the OEM carburetors, in this way you are able to use the OEM air filter box and OEM airhorns. Also the riser plates come with mounting options for an air intake temperature sensor, this is nicely hidden away between the ITBs. The diameter for the ITBs in the riser plate is 45mm. There is also an option for using airhorns, In this case you don’t need the riser plates.
The crank sensor and trigger wheel kit are additional and this type of kit is needed when using ITBs like these. Besides switching to ITBs you will need a stand alone ECU to get the fuel injection to work. Our kit only works with engines like the 3.0ltr that came with a “ big distributor”. You can leave the distributor or you can remove this unit when you are going to use a discoil type of ignition. In for case an adapter is included in the crank sensor kit. The pulley comes in 2 dimensions to choose from, a Ø116mm pulley and Ø126,5mm pulley.
Fuel injectors, fuel lines, standalone ECU, wiring harness are NOT included in the kit.
*In case of using as a replacement part 3 mounting holes for the carburetors or ITBs need to be re thread with a timesert or helicoil. Otherwise it is impossible to mount a threaded stud.
Kit Includes
2 x Full billet, hard anodised intake manifolds
6 x ITB complete with lever assembly
6 x Airhorns 45mmØx30mm
2 x Fuel rail with mounting hardware
1 x Throttle linkage with 2 throttle connection rods
1 x Direct mount fuel pressure regulator
2 x Riser plates with 1 air temperature sensor (for use with OEM air filter box)
1 x Crank sensor and trigger wheel kit (optional)
All needed gaskets and mounting hardware.
- Porsche 911 1978-1983 3.0L / SC
For 3.0ltr SC or modified engines using the 3.0ltr as donor engine

Fits:
Porsche 911 3.0ltr - 1978 - 1983
Sizes Porsche 911 intake manifolds
Bosch injection system Ø39mm engine side - Ø42mm ITB side. Recommended for 3.0ltr engines
Bosch injection system Ø41mm engine side - Ø45mm ITB side. Recommended for custom set-ups or tuned engines
Bosch injection system Ø42mm engine side - Ø45mm ITB side. Recommended for custom set-ups or tuned engines
Injectors options that can be used - 260cc / 300cc / 380cc / 420cc / 480cc / 520cc
This is a direct replacement kit for replacing carburetors while keeping the OEM look in your engine bay.
The intake manifolds and riser plates are manufactured out of a single piece of 6082 aluminum and come in 2 styles. These differ in design due to the shape of the mounting flange for the cylinder head. The intake manifold can be used as replacement parts for the OEM part when damaged or has to be replaced*.
The ITBs are manufactured out of cast aluminum, whist the fuel rails are made out of aluminum 6060 extrusion profile and come with AN6 ORB connection for the fuel lines. The direct mount fuel pressure regulator is directly mounted to the fuel rails, so in this case you don’t need to drill additional holes in the engine bay for mounting a fuel pressure regulator.
The throttle linkage and all mounting hardware is made from stainless steel and the pivoting point of the throttle linkage is a ball and socket design for smooth operation. The levers allow you to adjust and finetune mechanical movement of the ITBs
The dimensions of the assembly are the same as the OEM carburetor setup and the riser plate comes with same mounting holes as the OEM carburetors, in this way you are able to use the OEM air filter box and OEM airhorns. Also the riser plates come with mounting options for an air intake temperature sensor, this is nicely hidden away between the ITBs. The diameter for the ITBs in the riser plate is 45mm. There is also an option for using airhorns, In this case you don’t need the riser plates.
The crank sensor and trigger wheel kit are additional and this type of kit is needed when using ITBs like these. Besides switching to ITBs you will need a stand alone ECU to get the fuel injection to work. Our kit only works with engines like the 3.0ltr that came with a “ big distributor”. You can leave the distributor or you can remove this unit when you are going to use a discoil type of ignition. In for case an adapter is included in the crank sensor kit. The pulley comes in 2 dimensions to choose from, a Ø116mm pulley and Ø126,5mm pulley.
Fuel injectors, fuel lines, standalone ECU, wiring harness are NOT included in the kit.
*In case of using as a replacement part 3 mounting holes for the carburetors or ITBs need to be re thread with a timesert or helicoil. Otherwise it is impossible to mount a threaded stud.
Kit Includes
2 x full billet, hard anodised intake manifolds
6 x ITB complete with lever assembly
6 x airhorns 45mmØx30mm
2 x fuel rail with mounting hardware
1 x throttle linkage with 2 throttle connection rods
1 x Direct mount fuel pressure regulator
2 x riser plates with 1 air temperature sensor (for use with OEM air filter box)
1 x crank sensor and trigger wheel kit (optional)
All needed gaskets and mounting hardware.
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Fits:
Porsche 911 2.0ltr - 1965 to 1968
Porsche 911 2.2ltr - 1969 to 1971
Porsche 911 2.4ltr - 1974 to 1977
Porsche 911 3.0ltr - 1978 to 1983
Descriptiion
The Idle control kit can be used with our ECU to control the idle speed.
Can be used with
KMS.06.001 - MA 5 ECU
KMS.01.001 - MD 35 ECU
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Fits:
Porsche 911 2.0ltr - 1965 to 1968
Porsche 911 2.2ltr - 1969 to 1971
Porsche 911 2.4ltr - 1974 to 1977
Porsche 911 3.0ltr - 1978 to 1983
Description
The Lambda UEGO (Universal Exhaust Gas Oxygen, pronounced “You-Way-Go”) CAN controller is a highly advanced broadband lambda controller designed for a Bosch LSU 4.9 broadband lambda probe. The sensor measures the oxygen level in the exhaust at a rate of 2000 samples/sec and converts this to a lambda value.
Connecting the KMS Lambda UEGO CAN controller is very easy thanks to the supplied wiring harness. The wiring harness contains the connections for the lambda probe, ground, analog output and CAN-bus output with which the controller can communicate.
A complete set for use with our MD35 or MP25 , the set includes:
- Lambda controller
- Wiring
- Superseal connector 3-pin
- 0,5m Canbus connection cable
- Weldbung
- 4.9 Bosch lambda probe
- Instruction manual
Features:
- Independent use with our KMS CAN displays
- Suitable for all types of fuel (gasoline, diesel, E85, methanol, etc.)
- Uses a modern Bosch LSU 4.9 broadband lambda sensor
- Analog and CAN communication
- Operating range from 0.65 to 1.5 Lambda (9.5 to 22.1 Air/fuel ratio)
- Controlled temperature of the lambda probe from 810°C ±10°C
- High sample rate of 2000Hz
- LED light on the housing for easy troubleshooting
- Water resistant
- Compact design
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Please note each set is made to order allow 6 - 8 weeks
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
102-102-00241-01
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Cam Position Sensor Mounting Bracket for ITB Conversions
The Rennen Cam Position Sensor Mounting Bracket is a precision-engineered component designed specifically for Porsche 911 and Porsche 964 Individual Throttle Body (ITB) conversions. Developed to provide a secure and accurate mounting location for a cam position sensor, this bracket enables modern engine management systems to utilise camshaft position data for improved ignition timing, fuel delivery and overall engine control.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
As Porsche enthusiasts increasingly move towards advanced EFI and standalone ECU systems, accurate engine position monitoring becomes critical. The cam position sensor mounting bracket provides the stability and precision required to ensure reliable sensor operation in both high-performance road and motorsport applications.
Designed to integrate seamlessly with Rennen by JSR ITB systems, this bracket helps unlock the full potential of modern engine management while preserving the character of the classic air-cooled Porsche engine.
What Does a Cam Position Sensor Mounting Bracket Do?
The mounting bracket securely positions the camshaft position sensor relative to the engine's camshaft trigger reference point.
This allows the ECU to accurately determine camshaft
position and synchronise critical engine functions, including:
- Sequential fuel injection
- Sequential ignition control
- Accurate engine timing calculation
- Cylinder identification
- Advanced ECU tuning strategies
- Improved engine management precision
Without a stable and accurately positioned sensor mount, the ECU may struggle to maintain consistent timing and engine synchronisation.
Why Is a Cam Position Sensor Important?
Modern engine management systems rely on precise engine position information to optimise performance.
Cam position data helps provide:
- Improved ignition accuracy
- More precise fuel delivery
- Enhanced engine response
- Improved idle stability
- Better cold-start performance
- Greater tuning flexibility
- Optimised engine efficiency
- Support for advanced ECU functionality
For high-performance Porsche engine builds, accurate camshaft position monitoring is often essential for extracting maximum performance and drivability.
Why Is an ITB Upgrade So Appealing?
Individual Throttle Body systems are widely regarded as one of the most desirable naturally aspirated performance upgrades available for Porsche engines.
Unlike conventional intake systems, ITBs provide each cylinder with its own dedicated throttle body, dramatically improving airflow characteristics and throttle response.
Benefits of a Rennen by JSR ITB conversion include:
- Instant throttle response
- Improved engine breathing
- Increased airflow efficiency
- Enhanced induction sound
- Greater tuning flexibility
- Improved driver engagement
- Increased performance potential
- Motorsport-inspired engine character
When combined with modern EFI and engine management systems, ITBs deliver a unique driving experience that blends classic Porsche character with modern performance technology.
Why Choose the Rennen by JSR Cam Sensor Bracket?
A precision-engineered sensor mounting solution is critical for accurate ECU operation.
Benefits include:
- Secure sensor mounting
- Accurate sensor positioning
- Improved ECU signal reliability
- Enhanced engine management performance
- Greater tuning accuracy
- Improved engine synchronisation
- Reliable operation in road and motorsport environments
- Professional-quality installation
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Crankshaft Position Sensor Mounting Bracket for ITB Conversions
The Rennen Crankshaft Position Sensor Mounting Bracket is a precision-engineered component developed specifically for Porsche 911 and Porsche 964 Individual Throttle Body (ITB) conversions. Designed to provide accurate and stable mounting of the crankshaft position sensor, this bracket enables modern engine management systems to monitor crankshaft position and engine speed with exceptional precision.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
As Porsche performance builds increasingly adopt standalone ECUs and modern EFI systems, accurate crankshaft position data has become essential for reliable ignition timing, fuel delivery and engine synchronisation. The Rennen by JSR mounting bracket ensures the crankshaft sensor remains securely positioned in relation to the trigger wheel, providing a clean and consistent signal under all operating conditions.
Whether building a fast-road Porsche, a high-performance air-cooled engine or a dedicated motorsport application, this bracket forms a critical part of a professional EFI and ITB conversion.
What Does a Crankshaft Position Sensor Mounting Bracket Do?
The crankshaft position sensor mounting bracket securely locates the crankshaft sensor in the correct position relative to the trigger wheel mounted on the engine.
This allows the ECU to accurately monitor:
- Crankshaft position Engine speed (RPM)
- Ignition timing reference
- Fuel injection timing
- Engine synchronisation
- Advanced ECU control functions
A stable and accurately positioned sensor is critical for reliable engine operation and precise ECU calibration.
Why Is a Crankshaft Position Sensor Important?
The crankshaft position sensor is one of the most important inputs used by a modern engine management system.
Without an accurate crankshaft signal, the ECU cannot reliably control ignition or fuel delivery.
Benefits of accurate crankshaft position monitoring include:
- Precise ignition timing
- Accurate fuel injection control
- Stable engine operation
- Improved starting performance
- Enhanced throttle response
- Greater tuning flexibility
- Improved engine efficiency
- Reliable high-RPM performance
For performance-oriented Porsche engine builds, accurate crankshaft data forms the foundation of effective ECU control and engine tuning.
Why Is an ITB Upgrade So Appealing?
Individual Throttle Body systems are widely regarded as one of the most exciting naturally aspirated performance upgrades available for Porsche engines.
By providing each cylinder with its own dedicated throttle body, airflow restrictions are reduced and throttle response is dramatically improved.
Benefits of a Rennen by JSR ITB conversion include:
- Immediate throttle response
- Improved airflow efficiency
- Enhanced engine breathing
- Increased performance potential
- Greater tuning flexibility
- Distinctive induction sound
- Motorsport-inspired engine character
- Increased driver engagement
When paired with modern EFI and engine management systems, ITBs offer a unique blend of classic Porsche character and modern performance technology.
Why Choose the Rennen by JSR Crank Sensor Bracket?
A precision-engineered crankshaft sensor mounting solution is essential for reliable ECU operation.
Benefits include:
- Accurate sensor positioning
- Stable trigger wheel alignment
- Consistent ECU signal quality
- Improved ignition timing accuracy
- Enhanced engine management reliability
- Professional EFI conversion installation
- Suitable for road and motorsport applications
- Supports advanced engine tuning strategies
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Rennen ITBs for Air-Cooled Porsche 911 - Advanced Roller Barrel Individual Throttle Bodies
The Rennen ITBs by JSR represent the next generation of
individual throttle body technology for air-cooled Porsche 911 engines.
Designed and engineered specifically to extract optimal performance from
classic Porsche flat-six engines, these innovative roller barrel throttle
bodies deliver exceptional airflow, sharper throttle response, and improved
engine efficiency compared to conventional butterfly valve throttle body
systems.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Developed through extensive research, flow simulation analysis and real-world testing, the Rennen ITB system provides a premium induction solution for performance-focused Porsche enthusiasts, restorers, track-day drivers and motorsport applications.
Whether you are building a high-performance Porsche 911 engine or converting a classic air-cooled Porsche to modern EFI, Rennen ITBs by JSR offer a significant advancement in intake technology.
Why Choose Rennen Roller Barrel ITBs?
Unlike traditional individual throttle bodies that utilise a butterfly valve positioned directly in the airflow path, the Rennen ITB system features a precision-engineered tapered roller barrel design.
This innovative approach provides several key advantages:
Unrestricted Airflow
The roller barrel design eliminates the butterfly valve obstruction found in conventional throttle bodies. With no throttle plate disrupting airflow, air moves more efficiently into the engine, improving volumetric efficiency and overall performance.
Increased Air Velocity
Because there is no butterfly valve occupying space within the throttle bore, the throttle body diameter can be optimised to maintain higher air velocity. Higher intake air speed promotes superior cylinder filling and enhanced engine response throughout the rev range.
Superior Fuel Atomisation
At partial throttle openings, airflow passes directly over the fuel injector. This promotes exceptional atomisation of the air-fuel mixture, improving combustion efficiency, drivability and throttle progression.
Instant Throttle Response
The short distance between the roller barrel and the inlet valve creates a highly responsive induction system, delivering immediate engine response and a direct connection between driver input and engine output.
The ITB kit comes with the ITBs mounted on intake
manifolds and with fuel rails made for the EV6 injector type.
Advanced Flow Simulation & Development
Extensive computational fluid dynamics (CFD) analysis and development testing have been carried out to optimise every aspect of the Rennen ITB design.
Flow simulation data demonstrates:
- Direct airflow over the fuel injector during part-throttle operation.
- Significantly reduced turbulence around the injector area compared to traditional butterfly throttle bodies.
- Up to 20% less airflow restriction at full throttle when compared with conventional ITB systems.
- Improved airflow consistency across all cylinders for enhanced engine balance and performance.
The result is a highly efficient induction system capable of supporting both fast road and high-performance motorsport applications.
Premium Motorsport-Grade Construction
Every Rennen ITB by JSR system is manufactured to the highest standards using precision CNC machining and premium materials.
Precision CNC Machined
All components are machined from high-grade 6082-T6 aluminium to ensure exceptional dimensional accuracy and durability.
Perfect Airflow Distribution
Tight manufacturing tolerances ensure evenly distributed airflow across all throttle bodies, promoting balanced cylinder performance and simplified engine tuning.
Easy Synchronisation
The robust design incorporates minimal joints and connections, allowing straightforward throttle synchronisation and reducing the need for ongoing adjustment.
Long-Term Reliability
Throttle barrels are mounted within sealed ball bearings for smooth operation, durability and long service life under demanding conditions.
Premium Sealing Technology
All sealing surfaces utilise Viton O-rings to prevent false air entry and maintain optimal engine performance.
Quality Components Throughout
Only premium bearings, rod ends and stainless-steel fasteners are used throughout the assembly, ensuring reliability and durability in both road and track environments.
Hard Anodised Finish - Available in Gun Metal or Black Finish
All aluminium components receive a hard anodised gunmetal
grey finish, providing corrosion resistance and an attractive
motorsport inspired appearance.
Specification
Fuel Rails machined for EV6 injector type
2 bolt inlet manifold to cylinder head mounting
48mm velocity stack ID
120mm velocity stack length
The Ultimate Porsche Individual Throttle Body Upgrade
For enthusiasts seeking the ultimate air-cooled Porsche induction system, Rennen ITBs by JSR combine cutting-edge engineering, advanced airflow technology and premium construction quality. The innovative roller barrel design delivers exceptional throttle response, improved airflow efficiency, enhanced fuel atomisation and proven performance gains.
Upgrade your Porsche 911 with one of the most advanced individual throttle body systems available and experience a new level of engine responsiveness, drivability and performance
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Rennen ITBs for Air-Cooled Porsche 911 - Advanced Roller Barrel Individual Throttle Bodies
The Rennen ITBs by JSR represent the next generation of
individual throttle body technology for air-cooled Porsche 911 engines.
Designed and engineered specifically to extract optimal performance from
classic Porsche flat-six engines, these innovative roller barrel throttle
bodies deliver exceptional airflow, sharper throttle response, and improved
engine efficiency compared to conventional butterfly valve throttle body
systems.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Developed through extensive research, flow simulation analysis and real-world testing, the Rennen ITB system provides a premium induction solution for performance-focused Porsche enthusiasts, restorers, track-day drivers and motorsport applications.
Whether you are building a high-performance Porsche 911 engine or converting a classic air-cooled Porsche to modern EFI, Rennen ITBs by JSR offer a significant advancement in intake technology.
Why Choose Rennen Roller Barrel ITBs?
Unlike traditional individual throttle bodies that utilise a butterfly valve positioned directly in the airflow path, the Rennen ITB system features a precision-engineered tapered roller barrel design.
This innovative approach provides several key advantages:
Unrestricted Airflow
The roller barrel design eliminates the butterfly valve obstruction found in conventional throttle bodies. With no throttle plate disrupting airflow, air moves more efficiently into the engine, improving volumetric efficiency and overall performance.
Increased Air Velocity
Because there is no butterfly valve occupying space within the throttle bore, the throttle body diameter can be optimised to maintain higher air velocity. Higher intake air speed promotes superior cylinder filling and enhanced engine response throughout the rev range.
Superior Fuel Atomisation
At partial throttle openings, airflow passes directly over the fuel injector. This promotes exceptional atomisation of the air-fuel mixture, improving combustion efficiency, drivability and throttle progression.
Instant Throttle Response
The short distance between the roller barrel and the inlet valve creates a highly responsive induction system, delivering immediate engine response and a direct connection between driver input and engine output.
The ITB kit comes with the ITBs mounted on intake manifolds and with fuel rails made for the EV6 injector type.
Advanced Flow Simulation & Development
Extensive computational fluid dynamics (CFD) analysis and development testing have been carried out to optimise every aspect of the Rennen ITB design.
Flow simulation data demonstrates:
- Direct airflow over the fuel injector during part-throttle operation.
- Significantly reduced turbulence around the injector area compared to traditional butterfly throttle bodies.
- Up to 20% less airflow restriction at full throttle when compared with conventional ITB systems.
- Improved airflow consistency across all cylinders for enhanced engine balance and performance.
The result is a highly efficient induction system capable of supporting both fast road and high-performance motorsport applications.
Premium Motorsport-Grade Construction
Every Rennen ITB by JSR system is manufactured to the highest standards using precision CNC machining and premium materials.
Precision CNC Machined
All components are machined from high-grade 6082-T6 aluminium to ensure exceptional dimensional accuracy and durability.
Perfect Airflow Distribution
Tight manufacturing tolerances ensure evenly distributed airflow across all throttle bodies, promoting balanced cylinder performance and simplified engine tuning.
Easy Synchronisation
The robust design incorporates minimal joints and connections, allowing straightforward throttle synchronisation and reducing the need for ongoing adjustment.
Long-Term Reliability
Throttle barrels are mounted within sealed ball bearings for smooth operation, durability and long service life under demanding conditions.
Premium Sealing Technology
All sealing surfaces utilise Viton O-rings to prevent false air entry and maintain optimal engine performance.
Quality Components Throughout
Only premium bearings, rod ends and stainless-steel fasteners are used throughout the assembly, ensuring reliability and durability in both road and track environments.
Hard Anodised Finish - Available in Gun Metal or Black Finish
All aluminium components receive a hard anodised gunmetal
grey finish, providing corrosion resistance and an attractive
motorsport inspired appearance.
Specification
Fuel Rails machined for EV6 injector type
2 bolt inlet manifold to cylinder head mounting
45mm velocity stack ID
120mm velocity stack length
The Ultimate Porsche Individual Throttle Body Upgrade
For enthusiasts seeking the ultimate air-cooled Porsche induction system, Rennen ITBs by JSR combine cutting-edge engineering, advanced airflow technology and premium construction quality. The innovative roller barrel design delivers exceptional throttle response, improved airflow efficiency, enhanced fuel atomisation and proven performance gains.
Upgrade your Porsche 911 with one of the most advanced individual throttle body systems available and experience a new level of engine responsiveness, drivability and performance
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Individual Roller Barrel Throttle Bodies (ITB) Upgrade for Modified 3.0ltr Engine
Unlock the full performance potential of your modified
air-cooled flat-six with the Rennen by JSR Individual Roller Barrel Throttle
Body (ITB) Upgrade, engineered specifically for a modified Porsche 911 3.0ltr engine featuring 41mm inlet ports. Combining advanced roller barrel induction
technology with stunning motorsport-inspired aesthetics, this complete system
is designed for enthusiasts seeking the ultimate throttle response, induction
sound and driver engagement.
Fits:
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Finished in premium gunmetal, this package includes beautifully machined silver velocity stacks, classic mesh air filters and a precision-engineered mechanical throttle linkage system. The result is a visually striking induction setup that delivers both exceptional performance and a period-correct motorsport appearance.
Whether installed on a modified road-going Porsche, fast-road build, restomod or dedicated competition engine, the Rennen by JSR Roller Barrel ITB system transforms the way the engine responds and feels throughout the rev range.
What Makes Roller Barrel Throttle Bodies Different?
Unlike conventional butterfly throttle bodies, Roller Barrel Throttle Bodies utilise a rotating cylindrical barrel to control airflow. This design creates a smoother and less restrictive airflow path when compared to traditional throttle plates.
Advantages of Roller Barrel technology include:
- Reduced airflow restriction
- Improved airflow efficiency
- Faster throttle response
- Enhanced cylinder filling
- Reduced turbulence
- Increased performance potential
- Motorsport-derived induction technology
This design has been used in high-level racing applications for decades and is widely regarded as one of the most effective naturally aspirated induction systems available.
Why Upgrade to Individual Roller Barrel Throttle Bodies?
Individual throttle bodies provide each cylinder with its own dedicated airflow path, allowing the engine to breathe more efficiently and respond immediately to throttle inputs.
Benefits include:
- Instant throttle response
- Sharper engine acceleration
- Improved airflow distribution
- Increased induction efficiency
- Enhanced engine character
- Greater tuning flexibility
- Improved performance potential
- Exceptional induction sound
For modified Porsche 911 3.0 engines with 41mm intake ports, the combination of optimised port sizing and individual roller barrel throttle bodies helps maximise the effectiveness of other engine modifications.
Motorsport Appearance with Premium Components
The Rennen by JSR package has been designed to look every bit as impressive as it performs.
Included within the system are:
- Gunmetal-finished roller barrel throttle bodies
- Precision-machined silver velocity stacks with ID of 45mm and height of 120mm
- Classic motorsport-style mesh air filters
- Mechanical throttle linkage assembly
The result is a visually stunning engine bay inspired by the legendary Porsche racing engines of the 1960s, 1970s and 1980s.
Mechanical Throttle Linkage for Pure Analogue Feel
A precision mechanical throttle linkage provides a direct connection between the accelerator pedal and the throttle bodies.
Benefits include:
- Immediate throttle actuation
- Exceptional pedal feel
- Accurate throttle modulation
- Direct driver feedback
- Enhanced engine response
- Traditional analogue driving experience
For enthusiasts who value mechanical connection and involvement, the linkage system delivers the authentic feel that makes air-cooled Porsche driving so rewarding.
Porsche Electronic Fuel Injection Throttle Kits - Precision Airflow & Throttle Control
Electronic Fuel Injection (EFI) Throttle Kits upgrade the engine’s air delivery system, providing precise throttle control, improved airflow, and enhanced engine response. Designed for performance builds, engine conversions, and modernised classic Porsche applications, these kits replace restrictive or outdated throttle systems with advanced electronic throttle bodies and control hardware.
Available from Design911, Porsche EFI throttle kits are engineered to deliver smoother power delivery, sharper throttle response, and improved drivability—especially in tuned, high-performance, or track-focused engines.
What Do Electronic Fuel Injection Throttle Kits Do?
EFI throttle kits regulate the volume of air entering the engine with high precision, directly influencing power and response.
Core Functions:
- Control engine airflow electronically and accurately.
- Improve throttle response and drivability.
- Support higher airflow demands in tuned engines.
- Enable precise fuel and ignition mapping.
- Enhance overall engine efficiency and performance.
Accurate throttle control is essential for modern performance engine management.
Why Do Standard Throttle Systems Fail?
Factory or older throttle systems can become limiting or
unreliable over time, particularly in modified engines. Common issues include:
- Mechanical throttle wear or cable stretch.
- Inconsistent airflow from ageing throttle bodies.
- Restrictive designs limiting high-RPM performance.
- Poor compatibility with modern ECU tuning.
- Inadequate response for high-performance applications.
These limitations can result in sluggish response, uneven power delivery, and reduced tuning potential.
Why Upgrade to an EFI Throttle Kit?
EFI throttle kits are designed to support modern engine management and higher performance demands.
Upgrade Benefits:
- Sharper, more consistent throttle response.
- Increased airflow capacity for power upgrades.
- Improved compatibility with aftermarket ECUs.
- Enhanced drivability for road and track use.
- Ideal for engine builds, conversions, and restorations.
Upgrading to an EFI throttle kit unlocks precise control and maximises engine tuning potential.
Highlights
- Porsche electronic fuel injection throttle kits
- Precision airflow and throttle control upgrades
- Designed for tuned and performance engines
- Improved response, drivability, and power delivery
- Compatible with modern ECU management systems