ARP 235-4712 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

The ARP 235-4712 cylinder head stud kit delivers professional-grade clamping force and reliability for high-performance engine builds. Manufactured from premium 8740 chrome moly alloy rated at 200,000 psi, these studs are engineered to exceed the demands of competition powerplants while providing superior strength over conventional head bolts.

Key Features:

• Premium 8740 chrome moly steel construction rated at 200,000 psi
• Undercut stud design equalizes stretch for more consistent clamping force
• 12-point head configuration for easy installation and removal
• Thread rolled after heat treatment for 10x better fatigue strength
• Centerless ground for exceptional concentricity and alignment
• Vertical rack heat treatment ensures complete penetration and uniform properties
• Includes hardened parallel-ground washers for even load distribution

Why Studs Over Bolts:

Head studs provide superior clamping consistency compared to bolts because they stretch purely on the vertical axis during torquing, without the twisting forces that affect bolts. This results in more accurate torque readings and even load distribution across the head gasket. The undercut design on shorter studs compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal engine sealing.

Manufacturing Excellence:

Each ARP stud undergoes precision heat treatment in a vertical orientation, followed by centerless grinding to achieve near-perfect concentricity. Thread rolling is performed after heat treatment—a costly but critical process that dramatically improves fatigue resistance. This meticulous manufacturing ensures cylinder heads and gaskets align perfectly during assembly, a hallmark of ARP quality that professionals rely on.

Every stud is stamped with the ARP logo as verification of authenticity and quality. Trusted by leading professional engine builders across all forms of racing, ARP head studs represent the gold standard in cylinder head fastening technology.