VERTEX 2-stroke pistons are cast using gravity casting from an aluminum alloy with 18% silicon content. The inclusion of silicon reduces thermal expansion at operating temperatures, which makes the piston less prone to rattling and breakage. Additionally, silicon enhances the wear characteristics of the pistons, thereby extending their lifespan. The piston kit comes complete with piston rings, piston pin, and circlips. VERTEX offers three types of 2-stroke pistons: Replica, which matches the original shape; Race, which enhances performance; and Pro Race, which is a forged special piston.