ARP Head Stud Kit for RZR XP 1000 / Turbo / Pro XP / Turbo RARP Head Stud Kit For Polaris RZR XP 1000 Turbo Turbo S Pro XP Turbo R RS1 Made from ARP2000 material and rated to 220,000 psi, ARP cylinder head studs not only offer superior clamp loads over cylinder head bolts, they provide proper alignment of the head and gasket with more accurate and consistent torque loading. Bolts will actually twist while torquing to proper spec, greatly reducing their ability to hold true. Recommended when running over 22