Radium Engineering Fuel Rail (S54)


Radium Engineering’s big bore fuel rail is machined, polished, laser etched and then anodised for a stealth surface finish. It is compatible with OEM and aftermarket direct fitment fuel injectors. It comes as a complete kit to directly replace your original fuel rail and feed line.

Optional fuel pressure gauge fits to the front of the fuel rail and allows for easy diagnosis of fuelling problems. For custom setups please contact us. This fuel rail is capable of being adapted to just about any use, including with custom fuel pressure regulators etc.

OEM configuration includes:

  • 1x Radium fuel rail
  • 2x Anodised mounting feet
  • 4x Stainless steel hardware
  • 1x 8AN ORB plug
  • 1x 3/8″ NPT plug
  • 1x 6AN male adapter
  • 1x PTFE-lined fuel feed hose
  • 1x SAE adapter to attach to OEM FPR


This kit will fit the E46 M3 as well as S54-engined Z3 M and Z4 M models. Installation instructions.