Radium Fuel Rail Plumbing - Subaru Models (inc. 2002-2014 Subaru WRX / 2007+ Subaru STI)
Radium Fuel Rail Plumbing - Subaru Models (inc. 2002-2014 Subaru WRX / 2007+ Subaru STI)
Radium Engineering
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PRODUCT DETAILS
RallySport Direct carries highly engineered products designed to improve the performance and longevity of your vehicle brought to you by Radium Engineering.
This is the Radium Engineering Fuel Rail Plumbing Kit. This plumbing kit has been designed to work with Radium Engineering's Subaru EJ fuel rail installations. This kit will interface with the factory feed and return hard lines in the engine bay near the LH strut tower and provides all of the underhood fuel plumbing. All necessary fittings and hoses are included along with an adjustable high-flow fuel pressure regulator.
HIGHLIGHTS:
- Designed to work in conjunction with Radium Engineering's fuel rails
- Compatible with Subaru platforms that use an EJ motor
- Interfaces with the factory hard lines near the LH strut tower using SAE quick-connects or older hose barb connections
- Includes an adjustable Radium Direct Mount Regulator and Radium 0-100 psi fuel pressure gauge
- The fuel pressure gauge can be installed at any of the 6AN junctions before the regulator using the included adapter
- The 6AN swivel fuel rail fittings are low profile making them ideal for tight spaces associated with the EJ motor
- The variety of reusable PushLok hose ends permits customizing such as adding a flex fuel sensor making installation simple
- The included 6AN fuel hose can be cut with standard tools and assembled without special skills
- The provided hose is resistant to all fuels including E85
NOTES:
- Does not include a fuel filter
- Not compatible with Radium Engineering's Dual Port Injector Fuel Rail Kit 20-0499
- Safe to use with alcohol fuels such as methanol, ethanol, and E85
- This kit uses 3/8" (6AN) high-pressure EFI fuel hose
- While a high-flow FPR is provided, the fuel system is still at mercy with the restrictive OEM venturi jet pump
- It is recommended to upgrade the OEM fuel pump unit
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
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WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
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Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
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We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
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Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
RallySport Direct carries highly engineered products designed to improve the performance and longevity of your vehicle brought to you by Radium Engineering.
This is the Radium Engineering Fuel Rail Plumbing Kit. This plumbing kit has been designed to work with Radium Engineering's Subaru EJ fuel rail installations. This kit will interface with the factory feed and return hard lines in the engine bay near the LH strut tower and provides all of the underhood fuel plumbing. All necessary fittings and hoses are included along with an adjustable high-flow fuel pressure regulator.
HIGHLIGHTS:
- Designed to work in conjunction with Radium Engineering's fuel rails
- Compatible with Subaru platforms that use an EJ motor
- Interfaces with the factory hard lines near the LH strut tower using SAE quick-connects or older hose barb connections
- Includes an adjustable Radium Direct Mount Regulator and Radium 0-100 psi fuel pressure gauge
- The fuel pressure gauge can be installed at any of the 6AN junctions before the regulator using the included adapter
- The 6AN swivel fuel rail fittings are low profile making them ideal for tight spaces associated with the EJ motor
- The variety of reusable PushLok hose ends permits customizing such as adding a flex fuel sensor making installation simple
- The included 6AN fuel hose can be cut with standard tools and assembled without special skills
- The provided hose is resistant to all fuels including E85
NOTES:
- Does not include a fuel filter
- Not compatible with Radium Engineering's Dual Port Injector Fuel Rail Kit 20-0499
- Safe to use with alcohol fuels such as methanol, ethanol, and E85
- This kit uses 3/8" (6AN) high-pressure EFI fuel hose
- While a high-flow FPR is provided, the fuel system is still at mercy with the restrictive OEM venturi jet pump
- It is recommended to upgrade the OEM fuel pump unit
