ARP 254-3709 Pro Series Cylinder Head Bolt Kit - 12-Point

The ARP 254-3709 Pro Series cylinder head bolt kit delivers professional-grade fastening performance for high-performance and racing engines. These head bolts are specifically engineered to provide superior clamping force and reliability in demanding applications where engine integrity is critical.

Construction and Materials:

• Cold-forged premium grade 8740 chrome moly steel construction for molecular integrity
• Heat-treated prior to thread rolling to achieve 200,000 psi tensile strength
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treatment for approximately 1000% better fatigue strength
• 12-point head design with reduced wrenching profile

Key Features:

• Wide-area flanged head eliminates need for valve train removal during retorquing
• Accommodates larger diameter valve springs due to compact head design
• Undercut short bolts provide additional stretch to compensate for head gasket compression
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Each fastener stamped with ARP for quality assurance

Performance Benefits:

• Provides consistent and accurate torque loading for reliable cylinder head sealing
• Superior strength meets ARP's zero-defect, zero-failure quality standard
• Precise manufacturing tolerances ensure cylinder heads and gaskets align perfectly during assembly
• Helps prevent head gasket failures through optimized clamping force distribution

This Pro Series head bolt kit is application-specific and designed for use with competition components. The advanced manufacturing process and premium materials make these fasteners the choice of professional engine builders across all forms of motorsports. Each kit comes complete with all necessary hardware and washers for a complete installation.