Radium Engineering Top Feed Fuel Rail Conversion – Nissan S13 SR20DET

This Radium Engineering fuel rail converts the OEM side feed fuel injection setup to top feed on the Nissan S13 SR20DET (RWD configuration). It is CNC machined from aluminium, black anodised for corrosion resistance, and supports high horsepower setups while remaining compatible with all fuel types, including E85.

The fuel rail features three -8AN ORB ports (front, rear, and underside) and a 1/8" NPT top port, offering flexibility for configuring fuel feed, return, and sensor integration. An optional Radium FPD-R fuel pulse damper (P/N 20-0776) can be installed into the underside centre port. Alternatively, this port can be plugged.

Injector Compatibility:
This rail is designed for top feed injectors, allowing the use of a wide range of high-flow aftermarket fuel injectors. The kit requires 34mm injectors with 14mm upper and lower O-rings.

Compatible injectors include:

• Injector Dynamics ID1050-XDS-34-14-14

• Injector Dynamics ID1300-XDS-34-14-14

• Injector Dynamics ID1700-XDS-34-14-14

• Injector Dynamics ID2600-XDS-34-14-14

Note: Due to limited hood clearance, taller injectors are not recommended.

Intake Manifold Compatibility:

• Nissan S13 SR20DET RWD intake manifold

• Some aftermarket manifolds that accept the OEM fuel rail

mportant Installation Note:
Re-use 3x OEM 5mm spacers (Nissan P/N 17522-10V00) beneath the supplied brackets for thermal insulation and correct rail height.

Ports and Fittings:

• 3x -8AN ORB female ports (ends + bottom centre)

• 1x 1/8" NPT female port (top)

Note:
Appropriate fittings must be selected based on your layout. Ensure clearance around the rail for components like FPRs, gauges, and dampers. Dimensional drawings are available on the product page for reference.

Compatibility:

• Nissan Silvia S13 SR20DET (RWD)

• May fit some compatible aftermarket manifolds