Radium Top Feed Upgrade Fuel Rails, Subaru EJ22 / EJ251

The Radium Engineering 20-0869-02 Top Feed Upgrade Fuel Rails suit Subaru EJ22 and EJ251 engines with factory top feed intake manifolds. They are a direct upgrade of the rails that still accept top feed injectors.

Each rail has three 8AN ORB threaded ports (6 total), and thermal insulating spacers are included to protect against heat transfer. The OEM fuel pressure regulator can be reused with Radium 20-0303, and a Radium 20-0776 fuel pulse damper can be fitted in the centre port.

Fuel injectors are NOT included.

Air Assist Elimination

• EJ251: install the provided O-rings into the lower groove on Bosch EV14 injectors.
• EJ22 (California spec only): requires 20-0816 injector seats (x4), 14-0720 spacers (x4) and flat head M8x1.25x60mm screws (x4).

Key Features

• 6 × 8AN ORB ports — three per rail for flexible plumbing
• Thermal insulating spacers — included to reduce heat transfer
• OEM FPR reusable — with Radium 20-0303 adapter
• Pulse damper ready — centre port accepts Radium 20-0776 FPD
• Fuel compatibility — suits all fuels including E85

Engine Fitment

• Subaru EJ22
• Subaru EJ251

Accessories

• 8AN ORB adapter fittings
• 8AN ORB direct mount regulators (DMR-RA)
• 8AN ORB fuel pulse dampers
• Fuel pressure gauge adapters

Appropriate fittings must be selected for your application. Leave enough space around the ports for accessories such as regulators, gauges and pulse dampers — contact Coore for dimensional drawings to check clearance.

Available Part Numbers

• 20-0869-02 — Fuel Rails, Top Feed Upgrade, Subaru EJ22/EJ251 (this product)
• 20-0303 — FPR Adapter to reuse the OEM regulator (sold separately)
• 20-0776 — Fuel Pulse Damper for centre port (sold separately)

Why Radium Engineering?

• ✔ Designed and manufactured in the USA
• ✔ CNC machined billet aluminium — precision fit, no compromise
• ✔ Trusted by professional motorsport teams and serious enthusiasts worldwide
• ✔ Exclusively distributed in Australia by Coore

Genuine Radium Engineering product, supplied by Coore Australia. Injectors and fittings sold separately. Professional installation recommended.

Browse more Radium Engineering parts at JDM Mods NQ