VERTEX 2-stroke pistons are gravity cast from an aluminum alloy with 18% silicon content. The silicon reduces thermal expansion at operating temperatures, making the piston less prone to rattling and breakage. Additionally, silicon enhances the piston's wear resistance, thereby extending its lifespan. The piston kit includes piston ring(s), piston pin, and piston pin retainer. Available configurations for 2-stroke pistons include: Replica, which matches the original form, Race for performance enhancement, and Pro Race for forged specialized pistons.