Radium Fuel Rail, BMW S54
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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
Ports And Fittings
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.
Configurations
20-0070-00 Fuel Rail Kit, BMW S54
This configuration includes all the parts shown in the picture below. This makes for a complete OEM fuel rail replacement for the E46 M3 chassis. NOTE: This OEM Ccnfiguration kit does NOT work in any other S54 vehicie.
- 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 basic rail includes only the fuel rail and mounting hardware. 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.
- 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
