Radium Engineering Top Feed Upgrade Fuel Rails – Subaru EJ20/EJ25 (Top Port)

These Radium Engineering fuel rails are designed for select JDM/EDM Subaru EJ engines requiring additional AVCS clearance. Featuring 8AN ORB top ports instead of center-lower ports, they are ideal for engines equipped with early-style vertical AVCS solenoids. This top-feed injector upgrade supports higher flow and compatibility with ethanol-based fuels.

Vehicle Compatibility:

• 01–06 Subaru Impreza WRX (JDM/EDM)

• 01–06 Subaru Impreza WRX STi (EDM)

• 01–02 Subaru Impreza WRX STi (JDM)

The following vehicles also require Radium Adapter 20-0372:

• 03–06 Subaru Impreza WRX STi (JDM)

• 04–11 Subaru Impreza (EJ253)

• 05–10 Subaru Forester (EJ253)

• 05–12 Subaru Legacy (EJ253)

• 06–09 Subaru Outback (EJ253)

Fuel Injector Compatibility: Compatible with factory or OEM equivalent injectors using 11mm upper O-rings.
Consult your injector supplier for specifics when upgrading.

Overview:

• Designed for JDM/EDM EJ engines with vertical AVCS solenoids

• 8AN ORB top ports provide necessary clearance

• Direct bolt-on fit using OEM intake manifold bosses

• Machined from 6061 aluminium and anodised for corrosion resistance

• Supports all fuel types including E85