ARP 134-3702 High Performance Cylinder Head Bolt Kit Chrome Moly - 8740

The ARP 134-3702 High Performance Series cylinder head bolt kit delivers professional-grade strength and reliability for demanding engine applications. Manufactured from premium 8740 chrome moly steel and heat-treated to 180,000 psi tensile strength—15% stronger than Grade 8 fasteners—these bolts provide superior clamping force and consistent torque loading for optimal head gasket sealing.

Key Features:

• Premium 8740 chrome moly steel construction rated at 180,000 psi tensile strength
• 12-point head design with wide area flange for easier installation and removal
• Thread rolled after heat treatment for approximately 10 times better fatigue strength
• Centerless ground to exacting tolerances for precise alignment and fit
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Reduced wrenching profile eliminates need for valve train removal during retorquing
• Wide flange head design permits use of larger diameter valve springs

Manufacturing Excellence:

• Cold-forged to ensure complete molecular integrity
• Vertically rack heat-treated for complete and uniform heat penetration
• Precision centerless ground for exceptional straightness and concentricity
• Thread rolled post heat-treat for maximum fatigue resistance

ARP's High Performance Series head bolts are engineered for enthusiasts and builders who demand quality above OEM standards. The precision manufacturing process ensures that cylinder heads and gaskets align perfectly during assembly, while the superior material properties provide the clamping force needed to prevent head gasket failure under high cylinder pressures. Each kit includes all necessary fasteners and washers for a complete installation.

These bolts are ideal for high-performance street engines, mild competition applications, and any build requiring stronger and more reliable head fasteners than stock equipment. The 12-point head design allows for easier access in tight engine compartments while maintaining full torque capability.