Product Detail
Part #: 20 - 0578. The Radium Engineering plumbing kits are a perfect match for Radium Engineering Subaru EJ fuel rail installations. They connect with the factory feed and return hard lines in the engine bay near the LH strut tower, providing all the under - hood fuel plumbing. The kit comes with all necessary fittings, hoses, and an adjustable high - flow fuel pressure regulator. There are two kits available: one feeds the fuel rails in series, and the other in a parallel configuration. Both work equally well, and your choice depends on personal preference. Scroll down for more details on each kit. These kits are compatible with all Radium Fuel Rails for Subaru EJ engines, except for the 20 - 0499 Fuel Rails. Important Notes: 1. The kit does not include a fuel filter. 2. It's not compatible with the Radium dual - port injector fuel rail kit 20 - 0499. 3. It's safe to use with alcohol fuels like methanol, ethanol, E85, etc. 4. It uses 3/8' (6AN) high - pressure EFI fuel hose. The 20 - 0578 FUEL RAIL PLUMBING KIT, SUBARU EJ, SERIES is compatible with all Impreza (WRX/STi) platforms using an EJ motor. For early vehicles with an engine - bay - mounted fuel filter, check the installation instructions. This kit connects to the factory hard lines near the LH strut tower using SAE quick connects or older hose barb connections. It includes an adjustable Radium Direct Mount Regulator (DMR) and a Radium 0 - 100psi fuel pressure gauge. You can install the fuel pressure gauge at any 6AN junction before the regulator with the included adapter. The 6AN swivel fuel rail fittings are low - profile, great for the tight spaces around the EJ motor. The reusable PushLok hose ends allow for customization, like adding a flex - fuel sensor, and make installation fast and easy. The included 6AN fuel hose can be cut with standard tools and assembled without special skills. Unlike regular low - quality rubber fuel hoses that break down with alternate fuels, this hose is resistant to all fuels, including E85. Check the photo below for the contents of the 20 - 0578 kit.
Using this Radium Engineering fuel rail plumbing kit is straightforward. First, if you have an early vehicle with an engine - bay - mounted fuel filter, make sure to read the installation instructions. Connect the kit to the factory hard lines near the LH strut tower using either SAE quick connects or older hose barb connections. You can install the fuel pressure gauge at any 6AN junction before the regulator with the provided adapter. The reusable PushLok hose ends let you customize the kit, like adding a flex - fuel sensor. Just cut the included 6AN fuel hose with standard tools and assemble it. Remember, this kit doesn't come with a fuel filter, and it's not compatible with the Radium dual - port injector fuel rail kit 20 - 0499. It's safe to use with alcohol fuels such as methanol, ethanol, and E85. When it comes to maintenance, regularly check the fittings and hoses for any signs of wear or leaks. If you notice any issues, replace the parts as needed. The hose is resistant to various fuels, but it's still a good idea to keep an eye on its condition over time.
