The VERTEX TopEnd Piston Kit for SUZUKI Pro Replica is designed to withstand the higher cylinder pressure typical of 4-stroke engines. VERTEX pistons are manufactured from forged pieces to endure the internal pressure of the engine, made from the highest quality 2618 aluminum alloy. To reduce wear, each VERTEX piston features a MOS2 coating on the piston skirt. As an original equipment manufacturer for some of the largest motorcycle manufacturers and trusted by many factory teams in the MXGP, VERTEX delivers outstanding performance. The VERTEX Top-End Piston Kit saves time and money, as this set includes everything needed for piston replacement. The kit includes a piston, cylinder gasket set, and timing chain. The 4-stroke piston design for Pro Replica is a forged piston that matches the original form. The Pro HC variant is a forged special piston with higher compression and performance enhancement.