Radium Engineering · New
Radium Engineering Subaru WRX/STI EJ-Series Engines Top Feed Fuel Rails (w/ Top Port)
MPN 20-0577-02 · Store SKU rad20-0577-02
Supplier stock checked 11/7/2026, 7:24:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The auxiliary port is located on the top surface of the fuel rails, making this setup ideal for applications that would experience clearance issues with AVCS components. For applications that were top-feed injectors from the factory. CNC machined, anodized and compatible with E85. FUEL RAILS, TOP FEED UPGRADE, SUBARU EJ, TOP PORT
Manufacturer fitment & guides
Check 20-0577-02 against the manufacturer’s application information below.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.