In-house designed and manufactured; all forgings are produced in W�ssner�s company-owned forging operation, 4-stroke pistons are made using a double-bridged forging design, Lightweight pistons with the tightest piston-wall clearances in the industry give you a quieter running engine, Standard and oversize pistons for most models, with high compression ratios available for 4-stroke applications, All piston skirts are supplied with a Moly coating to reduce friction and assist in break in, All piston kits include piston, ring, wrist pin and pin locks, W�ssner piston kits are used by leading Supercross, Arenacross and MX GP teams