ARP 280-3700 Pro Series Cylinder Head Bolts 12-Point 200,000 PSI

The ARP 280-3700 Pro Series cylinder head bolts deliver professional-grade fastening performance for high-performance and competition engines. These premium fasteners are cold-forged to ensure molecular integrity and heat-treated prior to thread rolling, achieving a tensile strength rating of 200,000 PSI—significantly stronger than standard automotive fasteners.

Key Features:

• 200,000 PSI tensile strength rating for superior clamping force
• 12-point head design with reduced wrenching profile and wide area flange
• Cold-forged construction ensures molecular integrity and exceptional durability
• Heat-treated prior to thread rolling for optimal fatigue strength
• Thread rolled after heat-treat provides approximately 10 times better fatigue resistance
• Undercut short bolts (where applicable) provide more stretch to compensate for head gasket compression
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Wide area flanged head eliminates need for valve train removal during cylinder head retorquing
• Permits use of larger diameter valve springs

Manufacturing Excellence:

Each ARP Pro Series bolt undergoes precise vertical heat-treatment in special racks to ensure complete heat penetration throughout the fastener. Following heat-treat, bolts are centerless ground through multiple passes to achieve exceptional straightness and concentricity. This exacting manufacturing process ensures cylinder heads and gaskets align perfectly during installation.

Application:

ARP Pro Series head bolts are application-specific and designed for use with competition components. They meet ARP's zero-defect, zero-failure quality standard and are trusted by professional engine builders across all forms of motorsports. Each bolt is stamped with the ARP logo as your assurance of quality and authenticity.

For engines requiring frequent disassembly or where space constraints prevent stud installation, these head bolts provide the ultimate fastening solution with professional-grade reliability.