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RHS (Racing Head Service) 54240-05
Pro Action Un-Assembled LS1 Cylinder Head w/ .660" Lift Dual Springs; This RHS LS1 Head comes un-assembled: perfect for porting projects. Includes premium COMP Cams valvetrain parts to withstand up to .660" valve lift. Includes our 26925 springs, stainless valves, premium guides and seals.
RHS (Racing Head Service) 54240-06
Pro Action Un-Assembled LS1 Cylinder Head w/ .570" Lift LS6+ Springs; This RHS LS1 Head comes un-assembled: perfect for porting projects. Includes premium COMP Cams valvetrain parts to withstand up to .570" valve lift. Includes our 26906 LS6+ springs, stainless valves, premium guides and seals.
RHS (Racing Head Service) 54530-05HCS
Pro Action Pre-Assembled LS3 Cylinder Head w/ .660 Lift Dual Springs; Made with premium materials to the tightest tolerances, the Pro Action LS3 head is pre-assembled w/ .660 lift dual springs. Excellent air/coolant flow make it an excellent bolt-on performance head for 4.000+ bore LS.
