ARP 234-3701 Pro Series Cylinder Head Bolt Kit 12-Point 200,000 PSI

The ARP 234-3701 Pro Series head bolt kit delivers professional-grade fastening performance for high-performance and competition engines. These premium fasteners are engineered to provide superior clamping force and reliability under extreme cylinder pressures.

Construction and Materials:

• Cold-forged ARP2000 alloy rated at 200,000 PSI tensile strength
• Heat-treated prior to thread rolling for exceptional fatigue resistance
• Centerless ground for precise concentricity and easy installation
• Thread rolled after heat-treat for 10x better fatigue strength
• 12-point head design for improved grip and torque application

Key Features:

• Reduced wrenching head with wide-area flange eliminates need for valve train removal during retorquing
• Undercut short bolts equalize stretch for consistent clamping force across all fasteners
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Permits use of larger diameter valve springs due to compact head design
• Application-specific engineering ensures proper fit and performance

Performance Benefits:

• Superior head gasket sealing prevents blown gaskets under high cylinder pressures
• Consistent torque loading with minimal torsional stress during installation
• Precise manufacturing tolerances allow gaskets and cylinder heads to align perfectly
• Compensates for head gasket compression to maintain optimal clamping force

Each ARP Pro Series bolt is manufactured to meet ARP's zero-defect, zero-failure quality standard. The premium ARP2000 alloy and precision manufacturing processes make these fasteners the choice of professional engine builders in all forms of motorsports. All hardware and washers are included for complete installation.

Note: Re-torque fasteners after initial engine break-in to compensate for head gasket compression and ensure optimal sealing performance.