ARP 134-3610 Pro Series Cylinder Head Bolt Kit 12-Point 200,000 PSI

The ARP 134-3610 Pro Series cylinder head bolt kit delivers professional-grade clamping force and reliability for high-performance and racing engines. These fasteners are engineered to ARP's demanding zero-defect, zero-failure quality standard, making them the choice of top engine builders across all forms of motorsports.

Pro Series Construction and Materials:

• Cold-forged ARP2000 alloy construction rated at 200,000 PSI tensile strength
• Heat-treated prior to thread rolling for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Centerless ground through multiple precision passes to ensure exceptional straightness and concentricity
• 12-point head design with reduced wrenching profile and wide-area flange
• Undercut short bolts on applicable studs to equalize stretch and provide more consistent clamping force

Performance Benefits:

• Superior clamping force helps prevent head gasket failures under extreme cylinder pressures
• Allows cylinder head retorquing without valve train removal
• Precise tolerances ensure cylinder heads and gaskets align properly during assembly
• Wide-area flange permits use of larger diameter valve springs
• Hardened parallel-ground washers included for even load distribution and accurate torque readings

Each ARP Pro Series bolt undergoes vertical rack heat-treatment to ensure complete and uniform heat penetration throughout the fastener. The result is a cylinder head fastening system that provides consistent, reliable performance in the most demanding competition applications. ARP stamps each fastener as your assurance of genuine quality and precision manufacturing.

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