Wiseco 778M08296 82.96 mm 2-Stroke Personal Watercraft Piston Forged from high-silicon aluminum alloy for maximum strength and dependability. Innovative forging design and piston skirt provide maximum horsepower and torque. Wiseco High-Performance piston kits are priced with piston, rings, pins and circlips (unless noted otherwise). Oversize pistons require cylinder sleeving.