ARP 235-3702 Pro Series Cylinder Head Bolt Kit 12-Point 200,000 PSI

The ARP 235-3702 Pro Series cylinder head bolt kit delivers professional-grade fastener performance for high-performance and competition engines. These precision-engineered head bolts are designed to provide superior clamping force and reliability in demanding applications.

Key Features:

• Cold-forged ARP2000 material rated at 200,000 PSI tensile strength
• 12-point head design for precise torque application
• Heat-treated prior to thread rolling for optimal fatigue strength
• Wide-area flanged head eliminates need for valve train removal during retorquing
• Reduced wrenching hex accommodates larger diameter valve springs
• Undercut short bolts on select applications compensate for head gasket compression
• Includes hardened parallel-ground washers for even load distribution

Manufacturing Excellence:

Each ARP Pro Series bolt undergoes vertical rack heat treatment to ensure complete and uniform heat penetration throughout the fastener. Following heat treatment, bolts are thread-rolled—a process that produces vastly superior fatigue resistance compared to pre-heat-treat threading methods. The precision manufacturing process ensures proper alignment of cylinder heads and gaskets during assembly.

Application:

Pro Series head bolts are specifically designed for competition and high-performance applications where maximum clamping force and reliability are critical. The 12-point head design allows for accurate torque readings and facilitates quick engine assembly and disassembly—essential for racing engines that require frequent servicing.

ARP Pro Series fasteners meet the company's zero-defect, zero-failure quality standard, making them the choice of professional engine builders across all forms of motorsports.