XR Series 11mm Custom Age 625 Head Stud Kit for Polaris RZR XP Turbo/S, Pro XP, & Turbo R productvideo_qsbyL2EjH7A The OEM fuel rail is

The OEM fuel rail is made from plastic

reduces snag points

PREMIUM PROTECTION

you have a lot of options for mounting this mirror to almost any roll cage (OEM or aftermarket)

Includes Blow-Off-Valve (BOV) port and an extra port for a boost gauge

XR Series 11mm Custom Age 625 Head Stud Kit for Polaris RZR XP Turbo/S, Pro XP, & Turbo R productvideo_qsbyL2EjH7A The OEM fuel rail isDESCRIPTION Prevent 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