XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S & PRO XP UTV BOOST PIPE Pin & Cap CNC machined

Pin & Cap CNC machined from 17-4 HSS

Order your kit with an extra belt

and allow easier access to the plenum

the controller raises the fuel pressure back to 70 psi

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

XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S & PRO XP UTV BOOST PIPE Pin & Cap CNC machined*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