The VERTEX 2-Stroke Piston is crafted using a gravity casting process with an aluminum alloy containing 18% silicon. This silicon component is crucial as it reduces thermal expansion at operating temperatures, making the piston less susceptible to rattling and fracture damage. Moreover, silicon enhances the piston's wear characteristics, thereby extending its lifespan. This kit includes the piston, piston rings, piston pin, and piston pin circlips for a comprehensive solution. Piston Types for 2-Stroke Engines: Replica = piston matches the original form, Race = performance-enhancing piston version, Pro Race = forged special piston.