ARP 154-4002 Cylinder Head Stud Kit Chrome Moly Steel - 8740

The ARP 154-4002 cylinder head stud kit delivers professional-grade fastening performance using premium 8740 chrome moly steel construction. Engineered for high-performance and racing applications, these studs are precision-manufactured to provide superior clamping force and durability compared to standard head bolts.

Premium Manufacturing Process:

• 8740 chrome moly alloy rated at 200,000 psi tensile strength
• Vertical rack heat-treatment ensures complete and consistent heat penetration throughout each stud
• Centerless ground after heat-treat for precise concentricity and straightness
• Thread rolling performed after heat-treatment for approximately 1000% better fatigue strength
• Undercut shorter studs equalize stretch for more consistent clamping force

Key Benefits:

• Hex head design with hardened parallel-ground washers included
• Superior alignment during assembly—gaskets and cylinder heads install smoothly
• More accurate and consistent torque loading compared to bolts
• Studs stretch only on vertical axis during torquing, eliminating torsional stress
• Helps prevent head gasket failures through optimized clamping distribution
• Ideal for engines requiring frequent disassembly and servicing

Each stud is individually manufactured to exacting tolerances and stamped with the ARP logo as assurance of quality. This kit represents the same fastener technology trusted by top professional engine builders across all forms of motorsports competition.

Note: Studs should be installed finger-tight in a relaxed mode. Re-torque after initial engine run to compensate for head gasket compression.