XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S & PRO XP UTV BOOST PIPE The AO Base Clutch Kit

The AO Base Clutch Kit is your go-to solution for transforming the performance of any Can-Am X3 running the QRS clutch system

Pin & Cap CNC machined from 17-4 HSS

HCR's Long-Travel General kit has been proven and tested over time and given similar design and strength properties such as our full Long-Travel kits built for racing applications

Cooler intake temperatures

XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S & PRO XP UTV BOOST PIPE The AO Base Clutch Kit*STOCK IS SUBJECT TO AVAILABILTY* Prevent premature head gasket failure on bigger power engines! The XR Series CA 625 11mm direct replacement Polaris XPT head studs are for those wanting the ultimate strength for high horsepower engine builds. Manufactured by ARP using their proprietary Custom Age alloy, the XR series head stud is the strongest head stud available anywhere. Custom Age 625 alloy typically equals or exceeds the clamping force of ~2mm