Radium - Fuel Rail Kit for Subaru EJ Engines (Top Feed Upgrade & Side Feed Conversion)

Radium Engineering high-volume billet fuel rails for Subaru EJ series boxer engines provide maximum fuel distribution for high-output street and track builds. Extruded from 6061 aluminum and hard anodized in Radium's signature finish, these rails feature large 8AN ORB end ports and a massive internal bore that eliminates fuel starvation and hydraulic pressure pulsation across all cylinders.

Configurations & Engine Compatibility:

• Top Feed Upgrade - Standard Ports (SKU 20-0567-02): Direct bolt-on replacement for factory top-feed Subaru EJ205, EJ255, and EJ257 engines (2002-2014 WRX, 2007-2021 STI, Legacy GT, Forester XT). Compatible with 14mm upper O-ring fuel injectors.
• Top Feed Upgrade - With Center Top Port (SKU 20-0577-02): Same fitment as 20-0567-02, but engineered with an additional 8AN ORB port located centrally on top of each rail. Allows direct mounting of a Radium Fuel Pulse Damper (FPD) or custom secondary fuel feeds in tight engine bays.
• Side-to-Top Feed Conversion - Early EJ205/EJ257 (SKU 20-0568-02): Converts older side-feed TGV setups (e.g. 2004-2006 Subaru STI, 2004-2005 Forester XT, Legacy GT) to modern high-performance top-feed EV14 injectors without needing to swap TGV housings. Includes billet mounting adapters and hardware.
• Side-to-Top Feed Conversion - JDM Version 3-6 (SKU 20-0569-02): Converts classic JDM GC8 Subaru Impreza WRX / STI (Version 3 through Version 6 EJ20K / EJ207) from side-feed to high-flow top-feed injectors.

Features:

• 8AN ORB threaded end ports for maximum plumbing versatility (-6AN, -8AN, or -10AN feed/return lines).
• Laser-etched with Radium Engineering authentic branding.
• Compatible with pump gas, race fuel, and ethanol (E85/Flex Fuel).
• Includes phenolic thermal insulating spacers and stainless steel mounting hardware.