WOSSNER PISTONS Ring Set 77.94mm - 77.96mm RSC7800 Wossner (pronounced Werssner) Pistons, Germanys finest aftermarket forged piston company brings precision and quality to North America. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service. With our involvement with top teams around the World you can be assured to receive only the finest components from Wossner. Wossner has an advantage over most other companies with their in-house forging design, manufacturing capability and 5-Axis machining centers. Wossner has a commitment to the future and not only attends tradeshows around the world they invest in the latest technologies available to make sure customers receive nothing but the best.