Radium Engineering 02-14 Subaru WRX Dual Port Injection (DPI) Fuel Rails for 20-0489-00 / 01 kits


The fuel rail end ports are tapped for 10AN ORB. The top ports are tapped for 8AN ORB.

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Part # 20-0499

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10AN ORB Adapter Fittings can be found HERE.

8AN ORB Adapter Fittings can be found HERE.
8AN ORB Fuel Pulse Dampers can be found HERE.

Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide (20-0176 FPD-R shown below in top port).

These Radium dual port injection (DPI) fuel rails were designed specifically for the Radium 20-0489 TGV Housing Kit and are NOT compatible with any other TGV housing on the market. Manufactured with large 10AN ORB end ports, the fuel rails can support all necessary engine power requirements. The top auxiliary ports are threaded with 8AN ORB for ancillary accessories. The rails are CNC machined from solid 6061 aluminum, black anodized, and laser engraved for a high quality surface finish. They are compatible with all fuel types including alcohol mixtures such as E85 and is a necessary modification for those using methanol on high powered engines.


Each fuel rail has 4 injector ports that are machined to permit injectors with 14mm O-rings.

Primary Lower Fuel Injectors
Using the provided adapters, both OEM Subaru or 60mm Bosch EV14 style fuel injectors can be used. To reuse the OEM Subaru injectors, the provided top hat must be installed over the upper OEM injector O-ring as shown below.


-Black Laser Etched Aluminum Fuel Rails (x2)
-Injector Seats for Aftermarket Injectors (x4)
-Injector Hats with Filter Screens for OEM Injectors (x4)
-Phenolic Insulating Press-In Spacers (x4)
-Stainless Steel Hardware
-FKM Viton O-ring Seals

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