The VERTEX 2-stroke pistons are manufactured using gravity casting from an aluminum alloy with 18% silicon content. The inclusion of silicon reduces thermal expansion during operation, benefiting the piston by making it less prone to noise and damage. Additionally, silicon enhances wear resistance, thus extending the piston’s lifespan. The kit includes the piston(s), piston ring(s), piston pin, and piston pin retainer! Available in three variations for 2-stroke engines: Replica, which matches the original form, Race, which is designed for performance enhancement, and Pro Race, which features a forged special piston design. Ideal for those looking to maintain or boost the performance of their Yamaha or Fantic engines.