Product JET SKIPiston Back 290-887-060 Piston-0.25 SEA-DOO 657 Brand: OSAKA MARINE Description: SEA-DOO 657_Piston-0.25_290-887-060 Bore 0.78 You May Also Be Interested In Piston-0.75 POLARIS 780 Piston-0.75 POLARIS 900 VG-6003 Top End Gasket Kit For Yamaha VG-3137-M Complete Gasket Kit SUZUKI