Kit Includes:Piston, Rings, Clips and Pin (2618 Alloy Fully CNC Machined Race Piston)Complete Top End Gasket Kit by CometicKPMI S.S. White Diamond Valves, Stock Head Dia. (All Valves)Complete Dual Spring / High Performance Titanium Retainer Spring Kit Features:Complete piston assembly, gasket kit and valves to rebuild or service your bikes top endCost saving built into purchasing these components as a kitDesigned specifically for the performance demands of MX Bikes and QuadsPistons designed to maintain stock compression2618 Alloy Fully CNC Machined Piston with performance skirt coatingKPMI High Performance Valvetrain is known to outlast OEM by twice the service lifeLightweight Racing Spring Kit compatible with high performance cams