Radium Fuel Rails Top Feed Conversion - Subaru Models (inc. 2004-2006 STI / 2005-2006 Legacy GT)
Radium Fuel Rails Top Feed Conversion - Subaru Models (inc. 2004-2006 STI / 2005-2006 Legacy GT)
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.
These are Radium's Subaru EJ Top Feed Fuel Rail Conversion Kit. This kit will convert the OEM side feed fuel injector setup to top feed allowing the use of high-flow fuel injectors. The fuel rail injector bores are 14mm ID, are manufactured with a large internal bore, and can support all necessary engine power requirements. These are CNC machined from solid 6061 aluminum and are anodized black with laser engraving for a high-quality surfaced finish. The fuel rails are compatible with all fuel types including popular alcohol mixtures such as E85.
HIGHLIGHTS:
- CNC machined from solid 6061 aluminum
- Anodized black with laser engraving for a high-quality surfaced finish
- Compatible with all fuel types including popular alcohol mixtures such as E85
- The four billet injector seats are also anodized and laser-etched and provide a sealed receptacle for top-feed fuel injectors
- The seats are designed for injectors with 14mm lower O-rings
- Each fuel rail features (3) 8AN ORB threaded ports (6) total
- Press-fit spacers are included to thermally insulate the intake manifold heat transfer
INCLUDES:
- (2) Black anodized laser-etched aluminum fuel rails
- (4) Green anodized and laser-etched 22mm injector seats
- (4) Thermal insulating press-in spacers 15mm
- (4) Stainless steel M8 x 1.25 mounting bolts
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
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
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
TRUST, BUILT INTO THE PROCESS.
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.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
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.
These are Radium's Subaru EJ Top Feed Fuel Rail Conversion Kit. This kit will convert the OEM side feed fuel injector setup to top feed allowing the use of high-flow fuel injectors. The fuel rail injector bores are 14mm ID, are manufactured with a large internal bore, and can support all necessary engine power requirements. These are CNC machined from solid 6061 aluminum and are anodized black with laser engraving for a high-quality surfaced finish. The fuel rails are compatible with all fuel types including popular alcohol mixtures such as E85.
HIGHLIGHTS:
- CNC machined from solid 6061 aluminum
- Anodized black with laser engraving for a high-quality surfaced finish
- Compatible with all fuel types including popular alcohol mixtures such as E85
- The four billet injector seats are also anodized and laser-etched and provide a sealed receptacle for top-feed fuel injectors
- The seats are designed for injectors with 14mm lower O-rings
- Each fuel rail features (3) 8AN ORB threaded ports (6) total
- Press-fit spacers are included to thermally insulate the intake manifold heat transfer
INCLUDES:
- (2) Black anodized laser-etched aluminum fuel rails
- (4) Green anodized and laser-etched 22mm injector seats
- (4) Thermal insulating press-in spacers 15mm
- (4) Stainless steel M8 x 1.25 mounting bolts
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