The VERTEX Piston Kit for KTM, HQV, and HUSABERG Pro Replica is engineered to withstand the heightened cylinder pressure found in 4-stroke engines. The pistons are meticulously forged from the highest-quality aluminum alloy (2618) to endure the internal pressure within the engine. Each VERTEX Piston is equipped with a MOS2 coating on the piston skirt to reduce wear and extend longevity. VERTEX serves as the original equipment manufacturer (OEM) for some of the largest motorcycle manufacturers and is trusted by many factory teams in the MXGP for its outstanding performance. This comprehensive kit includes the piston, piston ring(s), piston pin, and circlips. The 4-stroke pistons come in two variations: Pro Replica, which is a forged piston that replicates the original shape, and Pro HC, a specially forged piston that offers higher compression and enhanced power output.