Kimpex - High Performance PTFE Piston for Ski-Doo (09-741M)High performance, long life pistons Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls PTFE coated to create the least amount of friction during the break in period All our pistons, wrist pins and circlips are manufactured to the original OEM specifications Our kits include: piston, ring(s), wrist pins and circlips All our Kimpex pistons and piston kits are covered by a limited three years warranty.