ARP 235-4713 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

The ARP 235-4713 cylinder head stud kit delivers professional-grade fastening solutions for high-performance and competition engines. Engineered with premium 8740 chrome moly steel, these studs are heat-treated to 200,000 psi tensile strength, providing superior clamping force and reliability under extreme conditions.

Key Features:

• Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
• Undercut studs for equalized stretch and consistent clamping force
• 12-point head design for precise torque application
• Thread rolled after heat-treat for 10x better fatigue strength
• Centerless ground for exceptional concentricity and alignment
• Includes hardened parallel-ground washers for even load distribution

Manufacturing Excellence:

• Vertically rack heat-treated for complete penetration and consistency
• Multiple-pass centerless grinding ensures perfectly straight studs
• Post-heat-treat thread rolling maximizes fatigue resistance
• Precision machining allows cylinder heads to align perfectly during assembly

Why Studs Over Bolts:

Head studs provide superior clamping accuracy compared to bolts because they stretch only along the vertical axis during torque application. Bolts experience both torsional and tensile forces simultaneously, resulting in less predictable torque readings. Studs should be installed finger-tight in a relaxed state, then torqued via the nut for consistent, reliable clamping force. The undercut design on shorter studs compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal engine sealing.

This kit is ideal for racing and high-performance applications where engine reliability and consistent cylinder head clamping are critical. Each stud is marked with the ARP stamp as your assurance of zero-defect quality.