ARP 445-3706 Cylinder Head Fasteners Stainless Steel - 12-Point

The ARP 445-3706 Cylinder Head Fastener Kit delivers professional-grade clamping force and reliability for high-performance engine builds. Part of ARP's Stainless Series, this kit features 12-point heads for superior wrenching access and corrosion resistance for long-term durability.

Premium Construction and Heat Treatment:

ARP head bolts are manufactured from premium grade 8740 chrome moly steel, vertically rack heat-treated to 200,000 psi for complete and consistent heat penetration. Each fastener is centerless ground after heat-treat to ensure near-perfect concentricity, allowing cylinder heads and gaskets to align precisely during assembly. Thread rolling is performed after heat-treatment, which provides approximately ten times better fatigue strength compared to pre-heat-treat threading methods.

Key Features:

• 12-point head design with reduced wrenching hex for easy access
• Wide-area flanged head eliminates need for valve train removal during retorquing
• Cold-forged construction ensures molecular integrity
• Rated at 200,000 psi tensile strength for competition-grade performance
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Select applications feature undercut short bolts to equalize stretch and prevent head gasket failures
• Stainless steel construction resists corrosion in harsh environments

Installation Benefits:

The flanged head design permits cylinder head retorquing without removing valve train components, making post-installation adjustments quick and simple. The wide flange also accommodates larger diameter valve springs for performance applications. Each kit includes hardened washers to ensure consistent clamping force and prevent fastener embedment.

ARP's exacting manufacturing tolerances and quality control procedures ensure zero-defect, zero-failure performance. Each fastener is stamped with the ARP logo as verification of authenticity. Designed for both street performance and competition applications where maximum reliability is essential.