ARP 235-4202 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

The ARP 235-4202 High Performance Head Stud Kit delivers professional-grade strength and reliability for demanding engine applications. Manufactured from premium 8740 chrome moly steel and heat-treated to 200,000 psi, these studs provide the superior clamping force needed to prevent head gasket failure in high-performance and competition engines.

Key Features:

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

Why Choose Studs Over Bolts:

Head studs provide superior performance compared to bolts by stretching only on the vertical axis during torquing, eliminating the twisting forces that bolts experience. This results in more accurate and consistent torque loading. Studs also simplify engine assembly by ensuring proper cylinder head and gasket alignment. The undercut design on shorter studs compensates for head gasket compression, providing more even clamping force across the entire head surface.

Manufacturing Excellence:

Each ARP stud undergoes precision manufacturing processes that set the standard in the industry. Unlike lower-quality alternatives, ARP studs are centerless ground through approximately ten precise cuts, resulting in parts so straight that cylinder heads and gaskets glide into perfect alignment during installation. The thread rolling process occurs after heat-treatment, which is significantly more expensive but produces dramatically superior fatigue resistance.

Trusted by professional engine builders across all forms of motorsports, ARP head studs represent the pinnacle of fastener technology. Each stud is stamped with the ARP logo as your assurance of zero-defect, zero-failure quality standards.