Top End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kit.MOS2 (Teflon/Molybdenum) Coated Skirts A rolled on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures.Machined Smooth Heads Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%.Anodized Domes Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons.Hypereutectic Casting Process Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures.This item fits the following vehicle applications:for Sea-Doo GT 1990-1991for Sea-Doo GTS 1992-1996for Sea-Doo GTX 1992-1993for Sea-Doo SP 1990-1996for Sea-Doo SPI 1993-1996for Sea-Doo SPX 1993for Sea-Doo XP 1992