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Radium Engineering Top Feed Fuel Rail Upgrade Kit for Subaru
[20-0167-01]
$449.00

Each rail features a large 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 -8AN ORB.

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.

Two sets of these press-fit phenolic spacers (8 total) and matching hardware are included to suit different height fuel injectors. All must use 11mm diameter upper O-rings just like the OEM Subaru top feed injectors.

The fuel rail kits are compatible with all fuel types including popular alcohol mixtures such as E85.

20-0167-01 INCLUDES:
-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 8AN ORB Plugs (x4)

The 20-0167-01 kit includes enough to plumb the rails in "Parallel, Flow-Through" or "Series". Refer to the More Details tab above for more information. If -8AN male fittings are required, they can be purchased here 14-0152. 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.

NOTE: Neither fuel rail kit comes 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 optional Radium 20-0176 fuel pulse damper can be used in any of the three -8AN ORB ports on the Subaru fuel rails.

Want to reuse the OEM Subaru FPR?
If the OEM 2-bolt flanged FPR will be reused, select the 20-0210 option above. This includes a 8AN ORB bushing and a pipe thread FPR adapter flange that threads into any of the ports allowing the OEM FPR to be clocked appropriately.

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