Upgrade your Polaris General, RZR, or Ranger engine for serious performance and durability with the EVP XR Head Stud Kit. Engineered for riders pushing high horsepower and boost, this kit features precision-machined 11mm studs crafted from ultra-strong ARP2000 alloy, offering exceptional tensile strength and fatigue resistance over standard chromoly. Designed to maximize clamping force while preserving block integrity, it’s the perfect solution to prevent head lift and ensure long-term gasket seal under extreme riding conditions. Whether you're building a weekend warrior or a competition-grade machine, this is the head stud kit built to handle it all.
Features:
- The 11mm (stock) OD is the ideal size to maximize clamping force without sacrificing block integrity
- Made from ARP2000 alloy that has superior fatigue cycle life, tensile strength and toughness and is rated to 220,000 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
