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the controller raises the fuel pressure back to 70 psi
These custom studs are designed to replace the factory head bolts and can be installed without having to remove the head
Pin & Cap CNC machined from 17-4 HSS
Cooler intake temperatures
Race tested for durability and performance
XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S & PRO XP UTV BOOST PIPE the controller raises the fuel*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
