This kit is NOT compatible with Radium dual port injector fuel rail kit 20-0499.ģ. The end decision is based on personal preference.īoth kits are compatible with all Radium Fuel Rails for the Subaru EJ engines (excluding 20-0499 Fuel Rails).Ģ. Two kits are offered one that feeds the fuel rails in series, and another that feed the fuel rails in a parallel configuration. All necessary fittings and hoses are included, along with an adjustable high-flow fuel pressure regulator. This kit interfaces with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing. Radium Engineering -8AN ORB fuel pulse dampers can be put on any fuel rail port.T he Radium Engineering plumbing kits are designed to compliment Radium Engineering Subaru EJ fuel rail installations. This correction can be measured throughout the RPM range and can often help an erratic surging idle. The internal diaphragm will absorb oscillation pulses and stabilize fuel pressure. – Black Anodized -8AN ORB to -8AN Male Fitting (x2)ĭo I need pulse dampers? 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, pulse damper(s) should be used (especially with high flow injectors). – Black Anodized -8AN ORB to -6AN Male 90deg Fitting (x1) – Black Anodized -6AN Female 90deg Coupler (x1) – Green Anodized -6AN Male to 3/8″ SAE Male Fitting (x1) Plugs are provided for all unused ports: (LH rear, RH rear port, and RH center). A PTFE -8AN crossover hose is used for the front of the rails. The inlet fittings permit the use of the OEM 3/8″ SAE quick connector. It is a direct bolt-on for all LS variations, excluding early LS1 engines that use an in-rail fuel pressure regulator. The 20-0263 Fuel Rail Plumbing Kit, LS Engines reuses the OEM fuel hose.

Stainless Steel Replacement Mounting Bolts (x4) OPTIONAL PLUMBING KIT:Ģ0-0263 Fuel Rail Plumbing Kit, LS Engines Stainless Steel Mounting Feet Hardware (x8)

Black Anodized Aluminum Mounting Feet (x4) Black Anodized Laser Etched Aluminum Fuel Rails (x2) Like the OEM fuel rails, the injector bores are 14mm ID so factory injectors are permitted. This kit is compatible with all fuel types including popular alcohol mixtures such as E85. These modular feet allow installation on the following GM engines by simply flipping them and reinstalling into different threaded holes on the rails: LS1, LS2, LS3, LS6, LS7, L76, L99 The kit features specifically designed billet mounting feet making the rails compatible with various LS engines. For a list of 8AN ORB adapter fittings, go HERE. Both lower center ports can be used for optional adapters and are also tapped with 8AN ORB (3/4-16 female) threads. All end ports are machined with 8AN ORB (3/4-16 female) threads. Each LS fuel rail features a large 0.69″ internal diameter bore to suit even the most fuel hungry engines. They are CNC machined from extruded 6063 aluminum, media blasted, black anodized, and laser etched for a high quality surface finish.

Radium fuel rail