Due to the higher cylinder pressure in 4-stroke engines, pistons are generally manufactured from forged pieces. To withstand the internal pressure of the engine, VERTEX pistons are forged from the highest quality aluminum alloy (2618). To reduce wear, each VERTEX piston features a MOS2 coating on the piston skirt. VERTEX supplies original equipment to some of the largest motorcycle manufacturers, and many factory teams in MXGP trust the performance of VERTEX. The package includes pistons along with piston rings, piston pin, and piston pin clip! The 4-stroke piston variant includes Pro Replica = forged piston matching the original shape, and Pro HC = forged special piston (higher compression and performance-enhancing). The Pro HC version is particularly renowned for delivering higher compression and superior performance, making it a top choice among professional riders and enthusiasts alike. Engineered meticulously for Suzuki motorcycles, this piston kit ensures optimal durability and exceptional engine efficiency. With its sophisticated design and high-quality materials, the VERTEX Piston Kit SUZUKI Pro HC guarantees not just enhanced engine performance but also extended engine life, giving you the confidence to tackle any terrain, whether on the track or off-road. Experience the best in motorcycle piston technology with VERTEX, where innovation meets reliability.