ARP 234-4602 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 234-4602 is a premium cylinder head stud kit engineered for high-performance and racing applications. This Pro Series kit features ARP's renowned 8740 chrome moly steel construction, heat-treated to 200,000 psi tensile strength for exceptional clamping force and reliability under extreme conditions.

Key Features:

• Premium 8740 chrome moly steel alloy rated at 200,000 psi tensile strength
• Vertical rack heat-treating process ensures complete and uniform heat penetration
• Centerless ground studs for near-perfect concentricity and precise alignment
• Thread rolled after heat-treat for 10x better fatigue strength than pre-treated threading
• Undercut shorter studs equalize stretch for consistent clamping force
• 12-point nuts with wide-area flanged washers for even load distribution
• Hardened parallel-ground washers included for accurate torque readings

Performance Benefits:

ARP's precision manufacturing process ensures cylinder heads and gaskets align perfectly during installation. The undercut stud design compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal engine sealing. Studs provide superior clamping consistency compared to bolts because they stretch only on the vertical axis during torquing, eliminating the twisting forces that affect bolt installations.

Installation Notes:

Studs should be installed finger-tight in a relaxed mode—never force them in with a jammed nut. Apply torque only to the nut, allowing the stud to stretch uniformly. Re-torque after initial engine run to compensate for head gasket compression.

Each stud is marked with the ARP stamp as assurance of quality. This kit represents the industry standard trusted by professional engine builders across all forms of motorsports.