ARP 202-4203 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 202-4203 cylinder head stud kit is engineered for high-performance and racing applications where maximum clamping force and reliability are essential. Manufactured from premium 8740 chrome moly alloy steel and heat-treated to 200,000 psi, these studs deliver superior strength and durability that exceeds aircraft-quality standards.

Key Features:

• Premium 8740 chrome moly steel construction rated at 200,000 psi tensile strength
• 12-point head design for improved wrenching access and torque application
• Precision heat-treated using vertical rack method for complete and uniform heat penetration
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treat for 10x better fatigue strength compared to pre-heat-treat threading
• Undercut studs (where applicable) equalize stretch for consistent clamping force
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Each stud stamped with ARP logo for quality assurance

Performance Benefits:

ARP studs offer significant advantages over conventional head bolts. Because studs are installed in a relaxed state and torqued from the top, they stretch only along the vertical axis when the nut is torqued, providing more accurate and consistent clamping force. The precision manufacturing ensures that cylinder heads and gaskets align perfectly during assembly, which is particularly valuable for racing engines that require frequent servicing. The undercut design on shorter studs helps prevent blown head gaskets by compensating for gasket compression and providing more uniform clamping across all fasteners.

This head stud kit represents the choice of professional engine builders across all forms of motorsports, delivering the strength, precision, and reliability required for high-performance and competition engines.