PROX Cast Piston Kit is an OEM-style 2-stroke piston designed for stable performance and dependable rebuilds. Gravity-cast aluminum alloy with ~18% silicon helps reduce thermal expansion for consistent clearances.
PROX Cast Piston Kit is built as a cast replica (OEM-style) solution for 2-stroke engine rebuilds, focusing on stability, fit, and long-term reliability. PROX piston designs are typically very close to stock specifications, with engineering refinements when opportunities for improved performance are found. The piston is produced using gravity casting from an aluminum alloy with approximately 18% silicon, a key element that helps reduce thermal expansion and supports consistent running clearances.
This kit is a smart choice when you want a dependable top-end refresh that maintains factory-like characteristics and helps keep your engine running smoothly under demanding riding conditions.
