![]() This fuel rail plumbing kit interfaces with the factory hard lines near the LH strut tower using SAE quick connects or older hose barb connections. Both kits use 3/8" (6AN) high pressure EFI fuel hose.Ģ0-0978 FUEL RAIL PLUMBING KIT, SUBARU EJ, SERIESįor early vehicles with an engine bay mounted fuel filter, consult the installation instructions. Both kits are safe to use with alcohol fuels such as methanol, ethanol, E85 etc.Ĥ. Neither kit is compatible with Radium dual port injector fuel rail kit 20-0499.ģ. The end decision is based on personal preference. Two kits are offered one that feeds the fuel rails in series, and another that feed the fuel rails in a parallel configuration. ![]() Vacuum Plug: A black oxide stainless steel screw that is used to maintain a constant (non dynamic) fuel pressure. Push-To-Connect: A nickel-plated brass fitting with Buna-N O-rings that is compatible with hard plastic 1/4" OD tubing.Ĥ. 3AN Male Fitting: A black zinc-plated adapter machined from high strength steel that is compatible with 3AN hose ends.ģ. Barbed Fitting: A black zinc-plated 3/16" (5mm) barb machined from high strength steel that is compatible with the following vacuum hoses: 5/32" (4mm), 3/16" (5mm), and 7/32" (6mm).Ģ. There are 4 interchangeable 10-32 threaded vacuum port fittings provided to cover all scenarios.ġ. It permits the installer to quickly point the vacuum fitting in any direction with no tools required. Furthermore, RA-series regulators feature a 360 degree swiveling vacuum reference port that is double O-ring sealed. Every detent permits 1psi (+/-0.5psi) of adjustment depending on current fuel pressure. To aid in adjusting pressure, there are incremental detents that provide haptic feedback to the user. With a simple turn of the knob, pressure will be increased or decreased. A jam nut and set screw are no longer required. ![]() RA-series regulators feature the first tool-less pressure adjustment. Both kits are compatible with all Radium Fuel Rails for the Subaru EJ engines (excluding 20-0499 Fuel Rails). All necessary fittings and hoses are included, along with a RA-Series FPR. Both kits interface with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing. These plumbing kits are designed to compliment Radium Engineering Subaru EJ fuel rail installations.
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