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Our Price: $249.95
Fuel Rail Selection
Plumbing Kit
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Click here to download installation instructions (PDF)

The fuel rail ports are tapped for 8AN ORB.

8AN ORB Adapter Fittings can be found HERE.
8AN ORB Direct Mount Regulators can be found HERE.
8AN ORB Fuel Pulse Dampers can be found HERE.
Fuel Pressure Gauge Adapters 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.

Depending on the vehicle's country of origin, this fuel rail conversion kit is compatible with the following OEM side feed TGVs (tumble generator valves) that came with the following Subaru models: 

2004-2006 Impreza WRX STi (that came with side feed injectors)
2005-2006 Legacy GT (that came with side feed injectors)
2005-2006 Outback XT (that came with side feed injectors)

2004-2005 Forester XT (that came with side feed injectors)


This fuel rail kit converts the OEM side feed fuel injector setup to top feed, allowing the use of high flow fuel injectors (not included). The fuel rail injector bores are 14mm ID. Manufactured with a large internal bore, the fuel rails can support all necessary engine power requirements. They are CNC machined from solid 6061 aluminum, black anodized, and laser engraved for a high quality surface finish. All 3 ports on each fuel rail are tapped with 8AN ORB (3/4"-16) threads

Machined phenolic mounting spacers and washers are included to completely isolate the fuel rail from heat transferred from the TGV housings and mounting bolts.  


Two sets of these press-fit phenolic spacers (8 total) and matching hardware are included to suit different height fuel injectors. The kit is designed for specific upper and lower O-ring spacing, as depicted below. 

The 4 billet injector seats are anodized and laser etched and are designed for 14mm diameter lower O-ring injectors.

Use the tall spacers and longer mounting bolts to accomodate this size injector:

Below are some of the many fuel injectors that are a direct fitment with this Radium fuel rail kit using the tall spacers:

Injector Dynamics ID725-48-14-14
Injector Dynamics ID850-48-14-14
Injector Dynamics ID1000-48-14-14
Injector Dynamics ID1050x-48-14-14
Injector Dynamics ID1300-48-14-14
Injector Dynamics ID1700-48-14-14
Injector Dynamics ID2000-48-14-14 
Evolved Injection EI550-48-14-14
Evolved Injection EI650-48-14-14
Evolved Injection EI850-48-14-14
Evolved Injection EI1000-48-14-14
Evolved Injection EI1200-48-14-14
Evolved Injection EI1300-48-14-14
Evolved Injection EI2200-48-14-14
Deatschwerks 17U-00-0050-4
Deatschwerks 17U-00-0060-4
Deatschwerks 17U-00-0072-4
Deatschwerks 17U-00-0095-4
Deatschwerks 16S-12-2200-4 

Use the shorter spacers and mounting bolts to accomodate this size injector:

Below are some of the many fuel injectors that are a direct fitment with this Radium fuel rail kit using the short spacers:

Injector Dynamics ID850-34-14-14
Injector Dynamics ID1050x-34-14-14
Injector Dynamics ID1300-34-14-14
Injector Dynamics ID1700-34-14-14
Injector Dynamics ID2000-34-14-14 
Evolved Injection DPI550-38-14-14
Evolved Injection DPI650-38-14-14
Evolved Injection DPI850-38-14-14
Evolved Injection DPI1000-38-14-14
Evolved Injection DPI1200-38-14-14
Evolved Injection DPI1300-38-14-14
Evolved Injection DPI2200-38-14-14
RC Engineering SM2-0310
RC Engineering SM2-0370
RC Engineering SM2-0450
Deatschwerks 16U-00-0042-4
Deatschwerks 16U-00-0050-4
Deatschwerks 16U-00-0065-4
Deatschwerks 16U-00-0090-4
Deatschwerks 16M-00-1500-4
Deatschwerks 16M-00-2200-4

This fuel rail conversion kit is compatible with all fuel types including popular alcohol mixtures such as E85.

20-0168-02 INCLUDES:

-Black Anodized Laser Etched Aluminum Fuel Rails (x2)
-Green Anodized and Laser Etched Injector Seats (x4)
-Phenolic Thermal Insulating Press-In Spacers, 27mm (x4)
-Phenolic Thermal Insulating Press-In Spacers, 15mm (x4)
-Phenolic Thermal Insulating Press-In Bolt Washers (x4)
-Stainless Steel M8x1.25 Mounting Bolts, Long (x4)
-Stainless Steel M8x1.25 Mounting Bolts, Short (x4)

20-0478 Fuel Rail Plumbing, Subaru EJ 

This engine bay plumbing kit is designed to be used with Radium fuel rails and includes all the necessary fittings, hose and other components to complete the installation and have a complete operating system.  This kit plumbs the fuel rails in series, beginning and ending at the factory hard lines near the LH strut tower.  It is compatible with all factory hard lines, whether SAE quick connect or hose barb connections. An adjustable Radium Direct Mount Regulator (DMR) is included along with a Radium fuel pressure gauge to calibrate the DMR. The 6AN swivel adapter fittings for the fuel rail ports are low profile making them ideal for the tight spaces associated with the EJ motor. Pushlock hose-ends are easy to work with, making installation quick and painless. A variety of hose-ends are provided so the installer can custom tailor the fuel line routing for their specific vehicle.

Unlike standard fuel hose that degrades with alternate fuels, the provided Vapor Shield hose is compatible with gasoline and alcohol blends, including E85. Furthermore, the hose has a special construction that prevents vapor permeation. And unlike PTFE, this fuel hose absorbs unwanted fuel injector pulses and has an improved bend radius. 

Included in the Plumbing Kit:
-Direct Mount Regulator
-6AN PushLok Hose Ends
-6AN Adapter Fittings
-SAE Quick Connect Fittings
-Vapor Shield EFI Hose
-Stainless EFI Hose Clamps
Exact kit contents are shown in the picture below:


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