Radium Engineering Honda B-Series Fuel Rail - 20-0370-02

Radium Engineering Fuel Rail — Honda B-Series (20-0370-02)

A 0.69" internal bore rail that supports whatever the engine needs — the volume is there for high-flow injectors without pressure drop across the rail at high duty cycle. CNC machined from 6061 aluminum, anodized, and laser etched.

Injector bores are 11mm ID, same as OEM, so factory injectors work and any OEM-equivalent aftermarket set will too.

Three ports are machined 8AN ORB (3/4-16 female), giving you flexibility in how you plumb the feed and return. There's also a provision to reuse the OEM fuel pressure regulator — if you're not, that leaves an open 1/8 NPT port for a sensor or gauge, or you can plug it. A Radium DMR 8AN ORB regulator or an FPD-R pulse damper can go in place of the OEM FPR.

Compatible with all fuel types including E85.

Fitment: Honda B-series — B16, B18, B20. Mounts using the OEM studs, nuts, and insulating spacers.

This part is the rail and mounting hardware only. Fittings, hoses, and the rest of the plumbing are separate — which is the point if you're building a custom fuel system.

Not CARB legal. Not for sale in California.