Radium Engineering Top Feed Fuel Rail Conversion – Nissan RB25DET (Non-NEO)

This Radium Engineering fuel rail is a direct bolt-on upgrade for the Nissan RB25DET (non NEO) engine, commonly found in the R33 Skyline and other models. It converts the factory side feed injector setup to top feed, enabling use of a wide range of high-flow fuel injectors.

Manufactured with a large 17.5mm internal bore, the fuel rail is compatible with E85 and supports all levels of performance. The body is CNC machined from extruded 6063 aluminium, black anodised for corrosion resistance, and features four 8AN ORB ports to suit custom plumbing setups.

Green anodised injector seats press into the intake manifold and are designed for injectors using a 14mm lower O-ring. The kit includes both tall and short thermally insulating spacers to accommodate multiple injector heights and reduce heat transfer from the intake manifold.

Fuel Injector Compatibility:
Use tall spacers and longer bolts for:

• ID1050-XDS-48-14-14

• ID1300-XDS-48-14-14

• ID1700-XDS-48-14-14

• ID2600-XDS-48-14-14

Use short spacers and short bolts for:

• ID1050-XDS-34-14-14

• ID1300-XDS-34-14-14

• ID1700-XDS-34-14-14

• ID2600-XDS-34-14-14

Note: Fuel injectors are not included and must be purchased separately.

Compatibility:

• Nissan RB25DET (Non NEO)
  For RB25DET NEO, use the appropriate Radium fuel rail (sold separately).