Radium Fuel Rails - GM LS EngineHigh flow fuel rails engineered by Radium Engineering for GM LS engines (LS1, LS2, LS3, LS6, LSX). CNC machined from billet aluminum with large bore internal passages, these fuel rails deliver superior fuel distribution and support high horsepower applications while maintaining a direct bolt on fitment. Compatibility GM LS1 engine GM LS2 engine GM LS3 engine GM LS6 engine GM LSX engine Key Features CNC machined billet aluminum construction Large bore