VERTEX 2-stroke pistons are gravity-cast from an aluminum alloy with 18% silicon content. The inclusion of silicon reduces thermal expansion at operating temperatures, resulting in less susceptibility to rattling and breakage. Additionally, silicon provides better wear resistance, extending the piston’s lifespan. The kit includes the piston, piston rings, piston pin, and piston pin clips. The 2-stroke piston designs are available in three variations: Replica (original form equivalent), Race (performance-enhancing), and Pro Race (forged special piston).