SBT Yamaha jet ski pistons are high quality, high strength, cast eutectic pistons. Our "standard" pistons are comparable to others premium pistons - anodized on the top surface for better heat resistance and surface strength, graphite coated on the sides to reduce friction between the piston and cylinder and enable efficient break in. SBT is so confident in the quality of our pistons that all pistons come with a LIFETIME warranty against manufacturers defect! The Yamaha 800 Piston Kit comes with our piston, complete set of steel rings, cir-clips, and piston pin - everything you need for swapping out a piston in your engine. Applications: 1998 Yamaha GP800 Piston 1998 Yamaha XL800 Piston 1999 Yamaha GP800 Piston 1999 Yamaha XL800 Piston 2000 Yamaha GP800 Piston 2000 Yamaha XL800 Piston 2001 Yamaha GP800R Piston 2001 Yamaha XL800 Piston 2002 Yamaha GP800R Piston 2002 Yamaha XLT 800 Piston 2003 Yamaha GP800R Piston 2003 Yamaha XLT 800 Piston 2004 Yamaha GP800R Piston 2004 Yamaha XLT 800 Piston 2005 Yamaha GP800R Piston