2007-2016 Subaru WRX STI Top Feed Fuel Rail Adapter for JDM STI Intake Manifold

Part#:
20-0172
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Product Information 

Each rail features a large 15.2mm (0.6") internal diameter bore to suit even the most fuel hungry engines. They are CNC machined from solid 6061 aluminum, black anodized, and laser etched for a high quality surface finish. All 3 ports on each fuel rail are tapped with 3/8" NPT.

The fuel rail kit comes with four -6AN male adapters. This is enough to plumb the rails in "Parallel, Flow-Through" or "Series". Refer to the More Details tab above for more information. If -8AN fittings are required, they can be purchased here 14-0185. Also included are four 3/8" NPT plugs. Two of the plugs can be used if the fuel rails will be plumbed in "Parallel, Dead End", as shown. The other two plugs can be used for the lower center ports if a fuel pulse damper is not used. Optional fuel pulse dampers can be selected and installed in the lower center ports. If the OEM 2-bolt flanged FPR will be reused, select the option above. 

For thermal insulation, machined phenolic spacers and washers are included to completely isolate the fuel rail from heat transfer via the TGV housings and mounting bolts. 


INCLUDED:

All parts listed below are included in the kit for a trouble and leak-free installation. 

-Black Anodized Laser Etched Aluminum Fuel Rails (x2)
-Phenolic Thermal Insulating Press-In Spacers, Tall (x4)
-Phenolic Thermal Insulating Press-In Spacers, Short (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)
-Black Anodized Aluminum -6AN Male Fittings (x4)
-Black Anodized Aluminum 3/8" NPT Plugs (x4)

NOTE: This fuel rail kit does NOT come standard with hoses.

Do I need a pulse damper? 

The opening and closing of the injectors creates pressure pulses in the fuel rail, which can lead to unstable fuel pressure. In order to achieve a safe and consistent rail pressure, a pulse damper should be used (especially with high flow injectors). The internal diaphragm will absorb oscillating pulses and stabilize fuel pressure. This correction can be measured throughout the RPM range and can often help an erratic surging idle. The Radium 14-0128 fuel pulse damper can be used in any of the three 3/8" NPT ports on the Subaru fuel rails.

NOTE: Radium 20-0178 FPD-R and 20-0179 FPD-XR (3/8" NPT dampers) can be used on either end of both fuel rails. However, grinding is required for fitment in the center port.




More Information
Weight5.00 lbs
Parent Product TypePerformance Upgrades
Product TypesFuel Rails
BrandRadium Engineering
MakeSubaru
ModelWRX
Year2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016