Radium Engineering Fuel Rail – BMW M3 E46 (S54)

This Radium Engineering fuel rail is designed for enthusiasts building a custom high-performance fuel system on the BMW S54 engine. CNC machined from 6063 aluminum and finished in black anodizing with laser-etched branding, this rail is suitable for use with all fuel types, including ethanol blends such as E85.

Vehicle Compatibility:
BMW E46 M3 – S54 Engine

Overview:
This option includes the fuel rail only and is ideal for custom fuel systems using an external regulator and bespoke fuel plumbing. No fittings, hoses, or adapters are included. Adapter fittings, gauges, and dampers can be selected separately to suit your specific layout.

Key Features:

• CNC machined 6063 aluminum construction

• Black anodized with laser-etched branding

• Compatible with all fuel types including E85

• Injector bores: 14mm ID – compatible with OEM and equivalent injectors

• Provisions for OEM injector retaining clips

Port Specifications:

• (x2) End Ports: 8AN ORB (3/4-16 female)

• (x1) Center Port: 3/8" NPT

Optional Accessories (Sold Separately):

• 8AN ORB fittings for feed and return lines

• 3/8" NPT plug or fittings for center port

• 14-0128 Fuel Pulse Damper (fits center port only due to space constraints)

• 20-1623-0X Direct Mount Fuel Pressure Regulator

• Fuel pressure gauge adapters for end ports

Installation Notes:

• Ensure adequate clearance when selecting fittings and accessories

• Refer to Radium dimensional drawings for space verification

• Center port supports only one style of fuel pulse damper