Build a cleaner and more flexible fuel system for your BMW inline-six with this fuel rail from Radium Engineering. It fits several M50, M52, M54, S50 and S52 intake manifolds while retaining the factory injector position and spacing.
The rail has three 8AN ORB ports, giving you room to configure the feed, return, pressure regulator, pressure gauge or fuel pulse damper around your setup. It works with factory-style injectors and is compatible with gasoline, ethanol blends and E85.
Compatible BMW Engines
- BMW M50
- BMW M52
- BMW M52TU
- BMW M54
- BMW M56 with compatible conventional fuel injectors
- BMW S50B30US
- BMW S52
Popular Vehicle Applications
- BMW 3 Series E36 325i / 325is with M50 (1992, 1993, 1994, 1995)
- BMW 3 Series E36 323i / 323is / 328i / 328is with M52 (1996, 1997, 1998, 1999)
- BMW M3 E36 with S50B30US or S52 (1995, 1996, 1997, 1998, 1999)
- BMW 3 Series E46 323i / 323Ci / 328i / 328Ci with M52TU (1999, 2000)
- BMW 3 Series E46 325i / 325Ci / 325xi / 330i / 330Ci / 330xi with M54 (2001, 2002, 2003, 2004, 2005, 2006)
- BMW 5 Series E34 525i with M50 (1991, 1992, 1993, 1994, 1995)
- BMW 5 Series E39 528i with M52 or M52TU (1997, 1998, 1999, 2000)
- BMW 5 Series E39 525i / 530i with M54 (2001, 2002, 2003)
- BMW 5 Series E60 525i / 530i with M54 (2004, 2005)
- BMW X5 E53 3.0i with M54 (2001, 2002, 2003, 2004, 2005, 2006)
- BMW Z3 2.8 with M52 or M52TU (1997, 1998, 1999, 2000)
- BMW Z3 2.5i / 3.0i with M54 (2001, 2002)
- BMW Z3 M Roadster / Coupe with S52 (1998, 1999, 2000)
- BMW Z4 E85 2.5i / 3.0i with M54 (2003, 2004, 2005)
Fitment Notes
- Fitment is based on the engine and intake manifold, not just the vehicle model
- Compatible with the North American S50B30US engine
- Does not fit the European S50B30 or S50B32 engines with individual throttle bodies
- Does not fit the S54 engine found in the E46 M3 and later Z3 M models
- Does not work with the original coupling-style injectors used on M56 SULEV engines
- An M56 application requires compatible conventional injectors and the correct fuel-system configuration
Fuel Injector Compatibility
- 14mm fuel injector bores
- Works with factory fuel injectors on compatible engines
- Works with aftermarket injectors that match the factory injector height and O-ring dimensions
- Retains provisions for the factory injector retaining clips
Ports and Fuel-System Setup
- Three 8AN ORB threaded ports
- One port at each end of the fuel rail
- One center port for a fuel pulse damper or other compatible accessory
- Compatible with Radium 8AN ORB adapter fittings
- Compatible with Radium direct-mount fuel pressure regulators
- Compatible with Radium FPD-R and FPD-XR fuel pulse dampers
- Compatible with an appropriate fuel-pressure gauge adapter
This is the fuel rail and mounting hardware only. Fittings, plugs, fuel lines, pressure regulator, gauge and fuel pulse damper are not included. The required plumbing depends on the engine and whether the car uses a return or returnless fuel system.
Specs & Features
- CNC-machined extruded 6063 aluminum construction
- Black anodized finish
- Laser-etched Radium Engineering logo
- Factory fuel-injector geometry
- Gasoline, ethanol-blend and E85 compatible
- Supports custom feed, return and regulator configurations
- Manufacturer part number: 20-0770
What’s Included
- Black anodized Radium Engineering fuel rail
- Mounting feet for compatible engines
- Stainless steel mounting brackets
- Anodized aluminum mounting brackets
- Stainless steel installation hardware
Installation
The rail installs in the factory injector location using the included engine-specific mounting feet. Because the rail uses 8AN ORB ports and does not include plumbing, you will need to choose the correct fittings, plugs, lines and pressure-control components for your fuel-system layout.
Check clearance around the end and center ports before adding a direct-mount regulator, pressure gauge or fuel pulse damper. The fuel system must be checked carefully for leaks after installation and before starting the engine.
Pairs Well With
- Radium Direct-Mount Fuel Pressure Regulator - Mounts directly to one of the rail’s 8AN ORB end ports and gives you an adjustable regulator for a custom return-style fuel system.
- Radium FPD-R or FPD-XR Fuel Pulse Damper - Installs in a compatible 8AN ORB port to help control pressure pulses created by the opening and closing of the fuel injectors.
- Radium Fuel Pressure Gauge with 8AN ORB Adapter - Adds an easy way to check base fuel pressure directly at the rail while setting up or diagnosing the fuel system.
About Radium Engineering
Radium Engineering makes fuel-system, crankcase-ventilation and fluid-control parts for street and motorsport builds. Its fuel rails and plumbing components are designed around common AN standards, making it easier to put together a fuel system that matches the engine and power goals.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.More in this category
Radium Engineering Fuel Rail
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