Radium Engineering Fuel Rail Kit | 2013-2021 Subaru BRZ/Scion FR-S/Toyota 86 (20-0111-02)

The FA20's port injection side is half its fueling story, and the factory rails cap that half.

The twin-injection boxer feeds each bank through its own port rail, and boosted builds outgrow the OEM pair fast. The Radium Engineering Fuel Rail Kit for the BRZ / FR-S / 86 replaces both: identical left and right rails manufactured with a large 0.69" internal bore supporting all necessary engine power requirements, anodized aluminum bodies with matching mounting brackets. End ports are tapped 8AN ORB (3/4"-16) and each rail carries a 6AN ORB (9/16"-18) center port, opening a custom high-flow fuel delivery system on a platform that arrives with none. This is the rails-and-brackets kit for builders running their own lines; fittings sold separately, all fuels including E85.

What You'll Feel

• Port-injection fueling headroom for the turbo and supercharger kits the platform attracts
• A custom plumbing canvas with 8AN ends and 6AN centers on both rails
• Even delivery across both banks through matched 0.69" bores
• Factory injectors reinstalled directly in OEM-spec bores
• Compatibility spanning FA20 and 2022+ FA24 cars alike

Features

• 2x identical fuel rails, 0.69" internal bore, anodized aluminum with mounting brackets
• End ports tapped 8AN ORB (3/4"-16); center port per rail tapped 6AN ORB (9/16"-18)
• Upgrade rail: OEM injectors reuse directly; upgrades must be OEM-equivalent in height and O-ring dimensions and styles
• Accepts Radium 8AN ORB direct mount regulators and fuel pulse dampers in the ports
• Rails and brackets only; fittings and adapters sold separately for custom plumbing
• All fuel types including E85

The Details

Radium's upgrade-rail rule applies: the OEM port injectors carry over, and any injector change must match factory height and O-ring specifications, with flow rates chosen by your tuner and dimensions confirmed with the injector manufacturer. The port architecture maps to Radium's ecosystem, with 8AN ORB adapters carrying feed and crossover, the end ports accepting a DMR direct mount regulator, and the 6AN centers hosting dampers or gauge adapters. Two companion notes worth planning around: the 20-0111-PK plumbing kit (sold separately) handles factory feed line hookup for stock-style installs, and on 2012-2021 cars Radium's DI ECU mount eliminates cutting the heavy gauge steel fuel rail shields during plumbing, a mount that is neither compatible with nor needed on 2022+ models. Fitment spans the FA20 cars (2013-2021 BRZ, FR-S, 86) and the FA24 2022+ BRZ and GR86.

Kit Includes

• 2x Anodized aluminum fuel rails (left/right identical)
• 2x Mounting brackets
• Fittings, adapters, and plumbing kit (20-0111-PK) sold separately

Applications

• 2013-2021 Subaru BRZ, Scion FR-S, Toyota 86 (FA20)
• 2022+ Subaru BRZ and Toyota GR86 (FA24)
• OEM or OEM-equivalent injectors only; DI ECU mount applies to 12-21 cars only