EVO Powersports Polaris RZR XP Turbo/S & PRO XP Custom Age 625 Head Stud Kit XR Series (11MM)

EVO Powersports Polaris RZR XP Turbo/S & PRO XP Custom Age 625 Head Stud Kit XR Series (11MM)

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. Designed by by Brian Crower and ARP and 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 Chromoly fastener in a smaller package. For the XP Turbo/Pro XP engine where there is not much material in the block to enlarge the stud significantly, these 11mm Custom Age 625 studs are the ideal solution. These head studs will keep your engines head sealed for the boost pressure required to produce 300-400 horsepower.

Why the Evolution Powersports XR Series CA-625 studs are superior to other studs on the market

• The 11mm (stock) OD is the ideal size to maximize clamping force without sacrificing block integrity
• Made from ARP CA-625 alloy - This super-alloy has superior fatigue cycle life, tensile strength and toughness and is rated to 260,000 psi tensile strength. For comparison, a typical 8470 chromoly stud is roughly 170,000 psi.
• Machined ball end allows the stud to bottom out in the case without losing any thread engagement.
• Includes head studs, nuts, and washers for the ultimate direct replacement head stud kit

XR Series

Evolution Powersports is proud to introduce the all-new XR Series! All the products in this Xtreme Racing line are race tested and have been designed and developed with extreme power and racing in mind. Many of the products are CNC machined and made from the highest quality materials available. Tested under the most grueling conditions in drag racing, short course & desert racing, these products ensure optimal performance and durability. Many of new XR Series products are manufactured exclusively for EVO in partnership with some of the best names in the powersports industry.

Included Parts

• (6) 11mm Nuts
• (6) 11mm Washers
• (6) 11mm Studs
• (1) Assembly Lube

Disclaimer

This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA -certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/that purchase this product represent and warrant that the product is purchased only in connection with EPA -certified, emission-regulations-exempt and noise-regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law.