ARP 154-3605 Cylinder Head Fasteners High Performance Chrome Moly - 8740

The ARP 154-3605 High Performance Series cylinder head bolt kit delivers professional-grade clamping force for demanding engine applications. Engineered from premium 8740 chrome moly steel and heat-treated to 180,000 psi (15% stronger than Grade 8), these fasteners provide exceptional strength and reliability for high-performance builds.

Key Features:

• Premium 8740 chrome moly alloy construction with 180,000 psi tensile strength
• Hex head design with wide-area flange eliminates need for valve train removal during retorquing
• Cold-forged manufacturing ensures molecular integrity and superior fatigue resistance
• Thread rolled after heat-treat for up to 10 times better fatigue strength
• Centerless ground to exacting tolerances for perfect alignment and easy assembly
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Reduced wrenching hex accommodates larger diameter valve springs
• Select applications feature undercut short bolts for more uniform clamping force

ARP's precision manufacturing process begins with vertical rack heat-treatment to ensure complete and consistent heat penetration throughout each fastener. The centerless grinding process involves multiple precision cuts to produce exceptionally straight bolts that allow cylinder heads and gaskets to glide into perfect alignment. Thread rolling is performed after heat-treatment, a more expensive process that dramatically improves fatigue strength compared to conventional pre-heat-treat threading methods.

Each kit comes complete with hardened parallel-ground washers to ensure proper torque readings and even load distribution across the cylinder head surface. The wide-area flanged head design allows for cylinder head retorquing without removing valve train components, saving valuable time during engine service and maintenance.

Trusted by professional engine builders across all forms of motorsports, ARP fasteners meet the company's rigorous zero-defect, zero-failure quality standard. Look for ARP stamped on each fastener as your assurance of quality and performance.