XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S, PRO XP, & TURBO R SP9100

XR SERIES 11MM CUSTOM AGE 625 HEAD STUD KIT FOR POLARIS RZR XP TURBO/S, PRO XP, & TURBO R SP9100Prevent premature head gasket failure on bigger power engines! The Evolution Powersports 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 larger 8470

Once you ride a properly clutched X3 that ramps up RPM quickly

including:

The EVP primary spring helps raise the engagement RPM for use with our Launch Control setup

Includes stainless steel mounting hardware

These are made in-house and tested in all our races in the USA

Simply unwrap and re-wrap again and again

4140 heat treated spindle pins and  12mm conversion double sheer front sway bar mounts with endlinks

It is a smart addition to any turbo vehicle

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Socket head cap screw hardware and throttle body o-ring are included

Don’t chance your luck and risk clutch or crankshaft damage using a weak or worn primary bolt

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