Radium Fuel Rail Plumbing Kit, LS1 / LS2 / LS3 / LS6 / L76 / L99 FPD-XR Requires a 2AN ORB (5/16"-24)

Requires a 2AN ORB (5/16"-24) threaded port for mounting

making them emissions compliant and track legal

Manufactured with a large internal bore to support all necessary engine power requirements

8AN ORB Plug

✅ Universal fitment — no cutting or fabrication required

Radium Fuel Rail Plumbing Kit, LS1 / LS2 / LS3 / LS6 / L76 / L99 FPD-XR Requires a 2AN ORB (5/16"-24)Radium Fuel Rail Plumbing Kit GM LS1 LS2 LS3 LS6 L76 L99 Complete your Radium Engineering fuel rail installation with this purpose built plumbing kit for GM LS series engines. Designed to work directly with Radium fuel rails, this kit includes all the hardware and fittings needed to tie the rails together and integrate cleanly into the factory fuel delivery system no fabrication, no guesswork. Whether you're building a street machine, a track car, or