Radium Fuel Rail Plumbing Kit, LS1 / LS2 / LS3 / LS6 / L76 / L99Radium 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