If you want your RZR Pro R to make reliable big power, reinforcing the cylinder heads is a must. Avoid premature head gasket wear or failure with EVP ARP Head Stud Kits that offer significantly improved clamp loads, and proper alignment of the head and gasket for more consistent/accurate torque loading. Whether you opt for the ARP 2000 or Custom-Aged 625+ alloy, both are designed to mimic the OEM design but with more thread engagement for a seamless direct replacement that delivers far superior durability.
ARP 2000 FEATURES:
ARP 2000: Strength-tested to 220,000 psi.
Made in the U.S.A.
Constructed from forged and heat-treated ARP 2000 material
Additional thread engagement compared to other studs
Mimics OEM design with significantly improved overall strength and durability
CUSTOM-AGED 625+ FEATURES:
Strength-testedÔªø to a minimum of 260,000 psi.
Made in the U.S.A.
Custom-Aged 625+ super alloy has superior fatigue cycle life, tensile strength and toughness (comparison: typical 8470 chromoly stud is roughly 170,000 psi.)
thread-rolled after heat treating to provide optimum fatigue strength
Additional thread engagement compared to other studs
Mimics OEM design with significantly improved overall strength and durability
