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- 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
Rennen Vacuum Fittings & Tube Set for Use with Rennen Vacuum Manifold
Complete your Porsche Barrel Individual Throttle Body conversion with the Rennen Vacuum Fittings & Tube Set, specifically engineered for use with the Rennen by JSR Vacuum Manifold. This installation kit provides the vacuum fittings, connectors and tubing required to correctly link each throttle body to the vacuum manifold, ensuring a stable and reliable vacuum signal for engine management and ancillary 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
Designed exclusively for Rennen by JSR Barrel ITB systems, this kit forms an essential part of the overall induction and engine management package. By combining the vacuum signals from each individual throttle body, the system creates a stable vacuum source that can be used for MAP sensors, fuel pressure regulators, idle control strategies and other engine management functions.
For any EFI-controlled Individual Throttle Body conversion, achieving a consistent vacuum signal is critical to drivability, tuning accuracy and overall engine performance.
What Does the Vacuum Fittings & Tube Set Do?
Individual throttle body systems generate vacuum independently from each intake runner. Because these vacuum signals fluctuate rapidly, they need to be combined through a vacuum manifold system to create a smooth and usable signal.
The Rennen Vacuum Fittings & Tube Set allows:
- Connection of each throttle body to the vacuum manifold
- Stable vacuum signal generation
- Accurate MAP sensor readings
- Improved ECU tuning capability
- Consistent engine load measurement
- Reliable idle control strategies
- Enhanced drivability
Without the correct vacuum plumbing, modern engine management systems can struggle to interpret engine load accurately.
Why Is a Vacuum Manifold Important on Barrel ITBs?
Barrel throttle bodies provide exceptional airflow and throttle response but naturally produce highly pulsed vacuum signals.
The Rennen by JSR Vacuum Manifold and associated fittings
help:
- Smooth vacuum fluctuations
- Improve MAP sensor accuracy
- Enhance fuel delivery calculations
- Improve ignition mapping accuracy
- Stabilise idle operation
- Improve low-speed drivability
- Simplify ECU calibration
The result is a more refined and predictable engine that retains all the performance benefits of an Individual Throttle Body conversion.
Why Are Individual Throttle Body Upgrades So Popular?
Individual Throttle Body systems are widely regarded as one of the most desirable naturally aspirated performance upgrades available for Porsche engines.
Benefits include:
- Instant throttle response
- Improved airflow efficiency
- Enhanced engine breathing
- Increased performance potential
- Greater tuning flexibility
- Motorsport-inspired induction sound
- Improved driver engagement
- Stunning engine bay appearance
When combined with modern EFI systems and correctly configured vacuum management, ITBs deliver exceptional performance and drivability.
Why Choose the Rennen Vacuum Fittings & Tube Set?
This kit has been developed specifically to work with the Rennen by JSR Vacuum Manifold and Barrel ITB systems.
Benefits include:
- Correct fitment for Rennen systems
- Simplified installation
- Reliable vacuum connections
- Improved tuning accuracy
- Stable engine management signals
- Professional conversion finish
- Suitable for road and motorsport use
- Supports advanced ECU functionality
- 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
Rennen ITB Silver Velocity Stacks for Air-Cooled Porsche 911 - Set of 6
Precision-Engineered Velocity Stacks Designed Exclusively for Rennen ITBs
Rennen ITB Velocity Stacks have been specifically developed
for use with the innovative Rennen ITB by JSR roller barrel throttle body
system. Designed to maximise airflow efficiency and complement the advanced
induction characteristics of the Rennen ITB, these premium velocity stacks help
optimise engine breathing, improve airflow stability and support maximum
performance from your air-cooled Porsche 911 engine.
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
Manufactured to exacting standards and available in both silver and black finishes, these velocity stacks provide the perfect finishing touch for high-performance Porsche engine builds, restomods, track cars and motorsport applications.
Available Sizes and Engine Size Combinations
Each velocity stack features an overall length of 120mm
and is available in three internal diameter options to suit a variety of engine
specifications and performance requirements:
- 2.7ltr / 3.0ltr Engine - 45mm Internal Diameter (ID)
- 3.2ltr / 3.5ltr / 3.6ltr Engine - 48mm Internal Diameter (ID)
- 4.0ltr Engine - 50mm Internal Diameter (ID)
These sizing options allow engine builders and tuners to select the most suitable intake configuration based on engine displacement, camshaft profile, intended RPM range and performance objectives.
Optimised Airflow Performance
The carefully designed bellmouth entry profile promotes smooth airflow into the throttle body, helping reduce turbulence and improve air velocity. This allows the induction system to operate more efficiently throughout the rev range while maintaining the sharp throttle response that the Rennen ITB system is renowned for.
By creating a smoother transition for incoming air, Rennen Velocity Stacks contribute to improved cylinder filling and consistent airflow delivery across all cylinders.
Premium Construction
Designed to match the quality and engineering standards of the Rennen ITB system, these velocity stacks offer exceptional durability and an outstanding motorsport-inspired appearance.
Key Features
- Designed exclusively for Rennen ITBs by JSR
- Available in silver or black finish 120mm overall length
- Available in 45mm, 48mm and 50mm internal diameters
- Precision-machined construction
- Optimised bellmouth profile for improved airflow
- Supports enhanced induction efficiency
- Complements Rennen roller barrel throttle body systems
- Suitable for road, track and race applications
- Designed for air-cooled Porsche 911 performance engines
The Perfect Addition to Your Rennen ITB Installation
Whether you are building a fast-road Porsche 911, a high-performance restomod, or a dedicated motorsport engine, Rennen ITB Velocity Stacks provide the ideal airflow solution for your induction system. Designed specifically to work with the Rennen roller barrel throttle bodies, they help deliver the performance, drivability and appearance expected from a premium Porsche performance upgrade.
- 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
Rennen ITB Black Velocity Stacks for Air-Cooled Porsche 911 - Set of 6
Precision-Engineered Velocity Stacks Designed Exclusively for Rennen ITBs
Rennen ITB Velocity Stacks have been specifically developed
for use with the innovative Rennen ITB by JSR roller barrel throttle body
system. Designed to maximise airflow efficiency and complement the advanced
induction characteristics of the Rennen ITB, these premium velocity stacks help
optimise engine breathing, improve airflow stability and support maximum
performance from your air-cooled Porsche 911 engine.
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
Manufactured to exacting standards and available in both silver and black finishes, these velocity stacks provide the perfect finishing touch for high-performance Porsche engine builds, restomods, track cars and motorsport applications.
Available Sizes and Engine Size Combinations
Each velocity stack features an overall length of 120mm
and is available in three internal diameter options to suit a variety of engine
specifications and performance requirements:
- 2.7ltr / 3.0ltr Engine - 45mm Internal Diameter (ID)
- 3.2ltr / 3.5ltr / 3.6ltr Engine - 48mm Internal Diameter (ID)
- 4.0ltr Engine - 50mm Internal Diameter (ID)
These sizing options allow engine builders and tuners to select the most suitable intake configuration based on engine displacement, camshaft profile, intended RPM range and performance objectives.
Optimised Airflow Performance
The carefully designed bellmouth entry profile promotes smooth airflow into the throttle body, helping reduce turbulence and improve air velocity. This allows the induction system to operate more efficiently throughout the rev range while maintaining the sharp throttle response that the Rennen ITB system is renowned for.
By creating a smoother transition for incoming air, Rennen Velocity Stacks contribute to improved cylinder filling and consistent airflow delivery across all cylinders.
Premium Construction
Designed to match the quality and engineering standards of the Rennen ITB system, these velocity stacks offer exceptional durability and an outstanding motorsport-inspired appearance.
Key Features
- Designed exclusively for Rennen ITBs by JSR
- Available in silver or black finish 120mm overall length
- Available in 45mm, 48mm and 50mm internal diameters
- Precision-machined construction
- Optimised bellmouth profile for improved airflow
- Supports enhanced induction efficiency
- Complements Rennen roller barrel throttle body systems
- Suitable for road, track and race applications
- Designed for air-cooled Porsche 911 performance engines
The Perfect Addition to Your Rennen ITB Installation
Whether you are building a fast-road Porsche 911, a high-performance restomod, or a dedicated motorsport engine, Rennen ITB Velocity Stacks provide the ideal airflow solution for your induction system. Designed specifically to work with the Rennen roller barrel throttle bodies, they help deliver the performance, drivability and appearance expected from a premium Porsche performance upgrade.