Wossner is Germany's finest aftermarket forged piston and rod manufacturer and have over 25 years of experience in the high-performance racing industry. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service. Features: In-house designed and manufactured; all forgings are produced in Wossner'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. Wossner pistons are used by leading Supercross, Arenacross and MX GP teams. Made in Germany. Specifications: Pi ston Size: 80.96MM Piston B NOTE: Wossner Piston Kits include the Piston, Wrist Pin, Circlips & Rings, Needle Bearings are not included.