The PROX Cylinder Gasket Set includes all necessary gaskets, rubber parts, and valve seals required for a piston rebuild (Top End). Crafted from high-quality materials, this gasket set ensures a reliable seal for your Yamaha engine components, guaranteeing top performance and durability. The set is designed to meet or exceed OEM specifications, making it a perfect choice for those requiring a high-standard replacement kit for their Yamaha motorcycles. Enhance your engine's efficiency and longevity with PROX's premium gasket set.