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Fuel rails / regulators
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Porsche 928 - 1980 to 1986 (non CIS)
Replaces Bosch 0280160262, 0280160232, 0280160215, Porsche 92811019802, 92811019801, 92811019800, 92811019826 (2.5 Bar no vacuum line connected)
Most of these regulators are original and now nearly 40 years old so they are prone to leak or fail causing all sorts of running and tuning issues. They are easy to replace, albeit a little bit fiddly being at the front of the manifold for the 3.2ltr engine. To suit the lower operating fuel pressure of the 3.2 Motronic, we use an adjustable fuel pressure regulator. This simple and elegant design uses steel O-Ring boss sealing adapters to the manifold.
Easily replaceable fuel pressure regulator.
Spare outlet for fuel pressure gauge or sensor.
The adjustable fuel pressure regulator has been tested with Bosch 044 fuel pumps, but the upper limit of fuel flow rate has not been tested.
Kit Includes:
- Porsche 911 3.2 Carrera / early 928 (non CIS) OEM fitting kit - SPA adjustable fuel pressure regulator
- Fuel pressure regulator body x 1
- 2.0 to 5.0 adjustable fuel pressure regulator instead of fixed regulator x 1
- Adapter fittings to fit OEM hose and fuel rail ends x 2
- Hose Tail fitting to fit factory return line x 1
- ORB Plug x 1
This kit must use the adjustable fuel pressure regulator as Bosch does not produce a standard 2.5bar pressure regulator in this form.
Please Note
Other fittings and options such as fuel pressure sensors, or fuel pressure gauges available upon request.
We have also developed fuel pressure dampers for the 3.2 and 928 engines, check out our site for the product details.
The fuel pressure regulator needs to be adjusted and set on the car after installation to ensure the operating conditions meet the factory specifications. A fuel pressure gauge and fittings to adapt to the factory fuel rails is required to be able to complete this procedure. The regulators are not shipped pre-set to the 2.5bar operating pressure.
We can also provide a solution for early 944 replacing Porsche part number 94411019801, Bosch part number 0280160214,
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92811019826
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
Adjustable fuel pressure regulator with JIC / AN fittings. Porsche 911 EFI upgrade
Fits:
Porsche 911 - 1974 to 1983 (CIS to EFI upgrade)
This is the Motorsport/Custom version of our fuel pressure regulator that uses AN6 JIC fittings and plugs to suit aftermarket fuel lines and fuel rail configurations when converting from CIS to EFI, or removing the later model fuel injection systems for an alternative custom setup.
Our adjustable fuel pressure regulator uses the latest Bosch regulators and is adjustable from 2.0 to 5.0 Bar pressures. This simple and elegant design uses O-Ring boss sealing adapters to the manifold with multiple options for hose connections. Ultimate hose layout flexibility is achieved through multiple port orientations and options so this allows for standard 3.2, 964, or 993 fuel hose configurations, or, for dead head configurations where there is a single feed line to each fuel rail and no return line from the rail, only this regulator.
Easy to replace regulator with Bosch OEM reliability
3 outlet ports for flexible hose, fitting, gauge, sensor port options - now or for the future
This kit is perfect for any EFI conversion on any of the air cooled 6 cylinder engines. These can be combined with our fuel rails that fit to either our 2 bolt adapters, or the 964/993 intake stacks
The Bosch regulator is rated to a maximum fuel flow of 200lpm. The adjustable pressure regulator flows more, but we have not yet measured its upper limits, but it has been proven to work with a Bosch 044 fuel pump.
Kit Includes:
- Fuel pressure regulator body x 1
- 2.0 to 5.0 adjustable fuel pressure regulator instead of fixed regulator x 1
- AN6 JIC fittings x 4
- ORB Plugs x 2
Applications
Any custom hose solution with AN/JIC Fittings for any vehicle with custom hosing and mounting.
Any 911 2.7/3.0 when removing the CIS and installing your own EFI solution.
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Our billet and anodised fuel rail kit bolts directly to the standard 3.2 intake manifold.
Using O ring fittings to the fuel rail, and AN 6 JIC fittings this allows for a very flexible choice of fuel hose arrangements.
Replicate the factory 964 system, or the 993 system, or really simplify and use a dead head system.
Rails are shipped with a combination of fittings or plugs.
This set makes it very easy to add fuel pressure sensing to the rails for those that want to tune, log or use protection strategies in your aftermarket ECU setup.
Check out our matching fuel pressure regulator to complete your fuel system today
Kit Includes:
- Fuel Rails x 2
- ORB to JIC Fittings x 4
- ORB Plugs x 2
- Anodised support adapters x 2
- Screws to fix to factory intake adaptors
Please Note
Cars with factory air conditioning compressors will need to use the supplied plugs to close the rear end of the fuel rails, and opt for a common "dead head" fuel hose arrangement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011030704
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
- 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
The CNC-machined and anodised fuel rail kit by Adapt Motorsport is designed for Porsche 964 and 993 3.6ltr engines using the standard intake adaptors. It can also mount to Adapt Motorsport two-bolt adaptors for earlier 2.7, 3.0 and 3.2ltr Porsche 911 engines.
Fits
- Porsche 911 964 3.6L with standard intake adaptors
- Porsche 911 993 3.6L with standard intake adaptors
- Earlier Porsche 911 2.7L, 3.0L and 3.2L engines fitted with Adapt Motorsport two-bolt intake adaptors
Check fitment for your specific vehicle (model, year, engine) before ordering.
What This Product Does
This twin-rail kit provides configurable fuel connections using O-ring ports and AN-6 JIC fittings. It supports hose arrangements based on the factory 964 or 993 system, as well as a simplified dead-head configuration, and allows fuel-pressure sensing to be added for compatible aftermarket ECU tuning, data logging or protection strategies.
Functions
- Mounts directly to standard Porsche 964 and 993 intake adaptors
- Supports factory-style 964 or 993 fuel-hose layouts
- Allows a dead-head fuel-system arrangement
- Provides connection points for fuel-pressure sensing
- Uses removable fittings and plugs for flexible installation
Technical Details
- CNC-machined and anodised construction
- AN-6 JIC fittings with O-ring fuel-rail connections
- Product references: AMS9050032 and AMS9050033
- Kit includes two fuel rails
- Includes four ORB-to-JIC fittings, two ORB plugs and mounting screws for factory intake adaptors
- Cars with factory air-conditioning compressors must use the supplied plugs to close the rear ends of the rails and use a dead-head fuel-hose layout
Why Replacement Matters
This kit provides a serviceable and adaptable rail arrangement for compatible standard or modified fuel systems. Its interchangeable fittings and plugs allow the installation to be configured around the selected hose layout, intake adaptors and pressure-sensing requirements.
FAQs
- Can the kit reproduce the factory fuel layout? It can be arranged in a factory-style 964 or 993 configuration, or installed as a simplified dead-head system.
- Does it fit earlier Porsche 911 engines? It fits 2.7L, 3.0L and 3.2L engines when used with the compatible Adapt Motorsport two-bolt intake adaptors.
- Can a fuel-pressure sensor be installed? Yes, the rail arrangement allows pressure sensing to be added for compatible aftermarket ECU systems.
- What is supplied? The kit contains two rails, four ORB-to-JIC fittings, two ORB plugs and screws for attachment to factory intake adaptors.
- Is there a special requirement for cars with air conditioning? Cars retaining the factory compressor must close the rear rail ports with the supplied plugs and use a dead-head hose arrangement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011045900
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
Fits:
Porsche 911 - 1974 to 1983 (CIS to EFI upgrade)
This is the Motorsport/Custom version of our fuel pressure regulator that uses AN6 JIC fittings and plugs to suit aftermarket fuel lines and fuel rail configurations when converting from CIS to EFI, or removing the later model fuel injection systems for an alternative custom setup.
Our fuel pressure regulator uses the latest Bosch regulators and is available in 3.8 Bar pressure. This simple and elegant design uses O-Ring boss sealing adapters to the manifold with multiple options for hose connections. Ultimate hose layout flexibility is achieved through multiple port orientations and options so this allows for standard 3.2, 964, or 993 fuel hose configurations, or, for dead head configurations where there is a single feed line to each fuel rail and no return line from the rail, only this regulator.
Easy to replace regulator with Bosch OEM reliability
3 outlet ports for flexible hose, fitting, gauge, sensor port options - now or for the future
This kit is perfect for any EFI conversion on any of the air cooled 6 cylinder engines. These can be combined with our fuel rails that fit to either our 2 bolt adapters, or the 964/993 intake stacks
The Bosch regulator is rated to a maximum fuel flow of 200lpm. The adjustable pressure regulator flows more, but we have not yet measured its upper limits, but it has been proven to work with a Bosch 044 fuel pump.
Kit Includes:
- AN 6 fitting kit - Bosch fixed pressure regulator
- Our flexible option uses JIC AN6 fittings, to allow for easy aftermarket lines to be made to suit your installation and hose layout.
- Fuel pressure regulator body x 1
- Bosch 3.8 bar fuel pressure regulator x 1
- AN6 JIC fittings x 4
- ORB Plugs x 2
- Mounting bracket to breather cover x 1
Applications
Any custom hose solution with AN/JIC Fittings for any vehicle with custom hosing and mounting.
Any 911 2.7/3.0 when removing the CIS and installing your own EFI solution.
- 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
Fits
Porsche 911 - 1974 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Our newly released fuel pressure regulator brackets mount to the Adapt Motorsport fuel pressure regulators to the engine breather cover bolts on top of the classic aircooled engines.
The same as Porsche do for the 964.
Manufactured from CNC machine aluminium and anodised in a dark silver colour, they really add a nice look to any classic Porsche engine bay.
Please Note
Only the regulator brackets and fasteners are included in the kit, the regulator is shown for reference purposes only and not included.
We have a range of different regulators that can be ordered.
Porsche Fuel Pressure Regulators - Precision Fuel Delivery Control
Fuel Pressure Regulators control and stabilise fuel pressure within the injection system, ensuring the correct amount of fuel is delivered to the engine under all operating conditions. Accurate fuel pressure is critical for combustion efficiency, throttle response, and engine safety—particularly in tuned or high-performance Porsche engines.
Available from Design911, Porsche fuel regulators include OEM replacements and performance upgrades designed to maintain consistent fuel pressure, support increased fuel demand, and improve reliability in performance-driven applications.
What Do Fuel Regulators Do?
Fuel regulators maintain controlled and consistent fuel pressure across the fuel system.
Core Functions:
- Regulate fuel pressure to injectors.
- Ensure consistent fuel delivery under varying load.
- Protect injectors and fuel pump from pressure spikes.
- Support accurate air-fuel ratios.
- Maintain stable engine performance and efficiency.
Precise fuel pressure is essential for reliable engine operation.
Why Do Fuel Regulators Fail?
Over time, fuel pressure regulators can degrade due to heat,
contamination, and mechanical wear. Common failure causes include:
- Diaphragm fatigue or rupture.
- Internal spring wear affecting pressure control.
- Fuel contamination causing blockage or sticking.
- Heat exposure in engine bay environments.
- Increased fuel demand from tuned engines exceeding stock capacity.
Failing regulators can lead to poor performance, fuel starvation, rich running, or engine damage.
Why Upgrade to a Performance Fuel Regulator?
Performance fuel regulators are engineered to handle higher fuel demands with greater precision.
Upgrade Benefits:
- More accurate and stable fuel pressure control.
- Improved support for tuned or modified engines.
- Enhanced reliability under high load and RPM.
- Compatibility with upgraded injectors and fuel pumps.
- Essential for safe performance tuning and engine builds.
Upgrading ensures the fuel system can meet increased performance demands safely.
Highlights
- Porsche fuel pressure regulator upgrades
- Precision fuel delivery and pressure control
- Designed for tuned and high-performance engines
- Improved reliability under high load
- Ideal for performance builds and rebuilds
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Pulleys
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Engine / Gearbox Mounts
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Oil Flow / Sump
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Engine Rods and Bolts
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Radiators
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Air Filters
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Air Induction Kits
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Camshaft Covers
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Performance Plenum
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Electronic Fuel Injection Throttle Kits
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ECU Re-Mapping DIY
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Electronic Throttle Booster
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IRIDIUM POWER Spark Plugs
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IRIDIUM RACING Spark Plugs
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Inter Coolers
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Turbo Chargers
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ECU Reader / Fault Finder
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Wössner Forged Piston Kit
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Wössner Steel Connecting Rods
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CP Carrillo Pistons
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CP Carrillo Connecting Rods
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Capricorn Engine parts
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OE MATCH Pistons and cylinders
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