Radium Fluid Lock Catch Can Kit - GM LS V8 EnginesCompatible Engines: LS1, LS2, LS3, LS6, LS7, L76, L99 Not compatible with: LS4, LS9, LSA. Important: Check your engine bay against the product images before ordering. Some engine setups may not be compatible due to extra belt driven accessories or emissions equipment in the mounting area. Depending on which vehicle the engine came from, minor modifications to the plastic rocker cover may be required. Verify clearance in the catch can mounting area