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The Radium Engineering fuel rail for the BMW S54 engine is machined and anodized for a compatibility with all fuel types including E85. Manufactured with a large internal bore, the fuel rail can support all necessary engine power requirements. It is compatible with OEM and aftermarket direct fitment fuel injectors. It features a large 0.65" internal bore with -8AN ORB (3/4-16 O-ring) threaded ports at each end and 3/8" NPT female center port to accept a variety of adapter fittings for custom high-flow fuel system builds. The fuel rail is a direct bolt-on for all BMW's equipped with the S54 engine, including:

2001-2006 BMW M3
2001-2002 BMW Z3 M Coupe
2001-2002 BMW Z3 M Roadster
2006-2008 BMW Z4 M Coupe
2006-2008 BMW Z4 M Roadster


The fuel rail end ports are tapped for 8AN ORB and center port is tapped for 3/8 NPT.

8AN ORB Adapter Fittings can be found HERE.
8AN ORB Direct Mount Regulators can be found HERE. Note: Regulator part number 20-0223-xx can install in the front fuel rail port on this engine.
8AN ORB Fuel Pulse Dampers can be found HERE.
3/8 NPT Adapter Fittings can be found HERE.
Fuel Pressure Gauge Adapters can be found HERE.

Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.




20-0070-00 Fuel Rail Kit, BMW S54
This configuration includes the fuel rail and all the parts shown in the picture below. This makes for a complete OEM fuel rail replacement for the E46 M3 chassis. The plumbing components work on the E46 M3 only, no other S54 powered vehicles. 
-1x  Radium fuel rail
-2x  Anodized mounting feet
-4x  Stainless steel hardware
-1x  8AN ORB plug
-1x  3/8" NPT plug
-1x  6AN male adapter
-1x  PTFE fuel feed hose
-1x  SAE adapter to attach to FPR (shown below)

20-0070-02 Fuel Rail, BMW S54
This option is the fuel rail ONLY. No fittings or hoses are included. This is ideal when plumbing a custom high flow fuel system using an aftermarket regulator and custom fuel lines. Fittings and adapters are available separately. 
20-0070-PK Fuel Rail Plumbing, BMW S54
The plumbing kits contains the items in the image below, and the are the same items used in the 20-0070-00 kit. This kit is only compatible with the E46 M3.
-1x  8AN ORB plug
-1x  3/8" NPT plug
-1x  6AN male adapter
-1x  PTFE fuel feed hose
-1x  SAE adapter to attach to FPR


Average Rating:
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Showing 1 Review:

by Dustin
on 6/21/2019
Bmw E46 M3 Fuel Rail
I didn't really need this considering my engine is mostly stock other headers/ap muffler/ tune. However I seen it and had have to it. Installation wasn't super easy but if you take your time and follow their instructions it wasn't too terrible. I looks amazing on the car along with their catch can kit and couldn't be happier. I am very impressed with the quality, look, and function of radium products. Great company/
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