The VERTEX 2-Stroke Pistons are gravity cast from an aluminum alloy with an 18% silicon content. The inclusion of silicon reduces thermal expansion at operating temperatures, making the pistons less susceptible to rattling and fractures. Additionally, silicon enhances the wear resistance of the pistons, thereby extending their lifespan. This piston kit includes the piston, piston rings, piston pin, and piston pin clip. The 2-stroke piston variants include: Replica (original shape equivalent), Race (performance-enhancing design), and Pro Race (forged specialty piston).