The Radium Engineering 20-0770 Fuel Rail is a billet aluminium fuel rail solution for BMW inline-six engines across the E36, E46, and Z4 platforms. CNC machined from extruded 6063 aluminium, black anodised, and laser etched, this rail is compatible with all fuel types including E85 and popular alcohol mixtures.

The injector bores are 14mm ID — matching OEM dimensions — so factory injectors or any aftermarket injector with the same height and O-ring sizes can be used. OEM injector retaining clip provisions are included. Three 8AN ORB ports (one centre, one at each end) provide connection points for fittings, FPDs, and FPRs. Fittings are not included and must be purchased separately.

Key Features

• CNC machined 6063 extruded aluminium — black anodised and laser etched
• 14mm ID injector bores — OEM equivalent, compatible with factory and aftermarket injectors
• OEM injector retaining clip provisions — factory clips reusable
• Three 8AN ORB ports — one centre, one at each end; O-ring style fittings required
• Centre port — optionally accepts Radium FPD-R or FPD-XR fuel pulse damper
• End ports — optionally accepts Radium DMR direct mount fuel pressure regulator
• E85 and alcohol fuel safe — compatible with all fuel types
• Mounting feet included — engine-specific anodised billet aluminium or polished stainless mounts provided for all compatible engines

Engine Compatibility

BMW M50 / S50

• Compatible with the North American S50B30US
• Not compatible with ITBs found on the non-US S50B30 and S50B32
• Mounts: anodised billet aluminium

BMW M52 / S52

• Full compatibility across M52 and S52 variants
• Mounts: anodised billet aluminium

BMW M52TU / M54 / M56

• Not compatible with OEM M56 "coupling-type" fuel injectors
• Mounts: polished stainless steel

Kit Includes

• Black anodised, laser etched fuel rail
• Mounting feet for all compatible engines (engine-specific)
• Stainless steel mounting hardware

Note: Fittings not included — must be purchased separately. O-ring style fittings required for all 8AN ORB ports. Ensure ample clearance around ports for FPRs, gauges, and FPDs — refer to dimensional drawings for reference.

Vehicle Fitment

• BMW E36 3 Series / M3 — M50, M52, S50 (US), S52
• BMW E46 3 Series / 330i — M52TU, M54, M56
• BMW Z4 (E85) — M54

Available Part Numbers

• 20-0770 — Fuel Rail, BMW M50 / M52 / M52TU / M54 / M56 / S50 / S52

Why Radium Engineering?

• ✔ Designed and manufactured in the USA
• ✔ CNC machined 6063 billet aluminium — black anodised, laser etched
• ✔ E85 and alcohol fuel safe throughout
• ✔ Trusted by professional motorsport teams and serious enthusiasts worldwide
• ✔ Exclusively distributed in Australia by Coore

Genuine Radium Engineering product. Stocked in Sydney for fast Australian delivery. Fittings sold separately. Not compatible with non-US S50B30/S50B32 ITBs or M56 coupling-type injectors. Professional installation recommended.