VERTEX 2-stroke pistons are cast from an aluminum alloy with 18% silicon content using gravity casting. Silicon reduces thermal expansion at operating temperatures, making the piston less prone to rattling and breakages. Additionally, silicon provides better wear characteristics, thus extending the piston's lifespan. The kit includes the piston, piston ring(s), piston pin, and piston pin clip! Available in 2-stroke configurations: Replica (original shape), Race (performance-enhancing), Pro Race (forged special piston). Perfect for maintaining or upgrading your Kawasaki engine.