The PROX Cylinder Gasket Set contains all the necessary gaskets, rubber parts, and valve seals for a piston rebuild (Top End). This high-quality set ensures a perfect fit and reliable sealing for your Yamaha engine. Designed for precision and durability, the PROX gasket set meets or exceeds OEM specifications, making it ideal for both professional mechanics and DIY enthusiasts. With this comprehensive kit, you can trust that your engine will be protected and perform at its best.