The PROX Cylinder Gasket Kit includes all necessary gaskets, rubber parts, and valve seals for top end piston rebuilds. Designed with top-notch quality, this kit ensures a reliable and efficient restoration of your Yamaha engine's performance. It comprises durable materials to withstand high temperatures and pressures, providing a perfect seal and maintaining engine integrity. Whether you are a professional mechanic or a DIY enthusiast, the PROX Cylinder Gasket Kit is an essential component for ensuring the longevity and optimal performance of your Yamaha motor.