ARP 241-3701 Pro Series Cylinder Head Bolt Kit 12-Point 200,000 PSI

The ARP 241-3701 Pro Series head bolt kit delivers professional-grade fastener performance for high-performance and competition engines. These premium head bolts are engineered to provide superior clamping force and reliability in demanding applications where standard fasteners simply won't suffice.

Pro Series Construction and Materials:

• Cold-forged ARP2000 material rated at 200,000 PSI tensile strength
• Heat-treated prior to thread rolling for maximum fatigue resistance
• Thread rolling performed after heat-treat provides 10x better fatigue strength
• Centerless ground for precise concentricity and perfect alignment
• 12-point head design for positive engagement and reduced installation effort

Performance Features:

• Reduced wrenching hex with wide area flanged head eliminates need for valve train removal during retorquing
• Undercut short bolts on select applications provide more uniform stretch and clamping force
• Accommodates larger diameter valve springs for high-performance builds
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Application-specific design ensures proper fit and function

Each ARP Pro Series head bolt is manufactured to exacting tolerances using premium 8740 chrome moly steel alloy. The vertical rack heat-treat process ensures complete and uniform heat penetration throughout each fastener, resulting in consistent mechanical properties. The precision centerless grinding operation produces exceptionally straight bolts that allow cylinder heads and gaskets to align perfectly during assembly.

ARP Pro Series fasteners meet the company's zero-defect, zero-failure quality standard and are the choice of professional engine builders across all forms of motorsports. Each bolt is stamped with the ARP logo as your assurance of quality and authenticity.

Installation Note: Bolts should be re-torqued after initial engine operation to compensate for head gasket compression and ensure optimal clamping force is maintained.