These sets include the head, base, and upper end gasketsThey are designed for piston replacementConstructed from quality materials that meet or exceed OEM specificationsMade in the USAFits Polaris:RZR XP 1000 Premium (24)RZR XP 1000 Sport (24)RZR XP 1000 Ultimate (24)RZR XP 4 1000 Premium (24)RZR XP 4 1000 Sport (24)RZR XP 4 1000 Ultimate (24)