VERTEX 2-stroke pistons are cast using a gravity die-casting process with an aluminum alloy containing 18% silicon. The silicon reduces heat expansion at operating temperatures. This advantage means the piston is less prone to rattling and breakage. Additionally, silicon enhances the wear properties of the pistons, thereby extending their lifespan. The piston kit includes pistons, piston rings, piston pins, and piston pin clips. Piston versions available for 2-stroke engines: Replica = pistons match the original form, Race = high-performance pistons, Pro Race = specially forged pistons.