Radium Engineering Fuel Rail Plumbing Kit – Subaru EJ Series Setup (EJ20/EJ25)

This Radium Engineering plumbing kit is designed for Subaru EJ-series engines and provides a complete solution for configuring the fuel system in a “series” layout. Ideal for performance applications using Radium top feed fuel rails and an aftermarket fuel pressure regulator.

Overview
This series plumbing configuration routes fuel through one rail and into the next before returning to the regulator, ensuring consistent pressure across both rails. The included RA-series DMR regulator allows fine-tuned control, while a 0–100 psi Radium fuel pressure gauge and adapter simplify calibration.

The kit connects to factory hard lines at the LH strut tower via SAE quick-connect or hose barb fittings. Reusable -6AN PushLok hose ends make it easy to add components like flex fuel sensors. The included hose is user-friendly and can be cut and assembled with common tools.

Key Features

• “Series” configuration for compact routing

• RA-Series DMR adjustable fuel pressure regulator

• 0–100 psi Radium fuel pressure gauge

• -6AN PushLok hose ends for modular setups

• Low-profile swivel rail fittings for tight engine bays

• SAE and hose barb hard line adapter fittings

• Compatible with E85 and alternative fuels

Vehicle Compatibility

• Subaru EJ2X Engines
  Note: For early models with engine bay-mounted fuel filters, consult the installation instructions.