ARP 235-4514 Cylinder Head Stud Kit Chrome Moly Undercut - 8740

The ARP 235-4514 head stud kit delivers professional-grade clamping force and reliability for high-performance engine builds. Engineered with premium 8740 chrome moly steel and heat-treated to 200,000 psi, these studs provide superior strength and fatigue resistance compared to standard head bolts.

Key Features:

• Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
• Undercut design on shorter studs equalizes stretch for consistent clamping force
• Centerless ground after heat-treat for precise concentricity and alignment
• Thread rolled after heat-treat for 10x better fatigue strength
• Hex head design with included hardened parallel-ground washers
• Vertical rack heat-treatment ensures complete penetration and uniform strength

Performance Benefits:

ARP studs offer significant advantages over conventional head bolts. The stud design eliminates torsional stress during installation, allowing the fastener to stretch only on the vertical axis for more accurate torque loading. The undercut feature on shorter studs compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal cylinder head sealing. Centerless grinding ensures cylinder heads and gaskets align perfectly during assembly, critical for race engines requiring frequent servicing.

Installation Notes:

Install studs finger-tight in a relaxed mode—never force them in with a jammed nut. Apply torque only to the nut, not the stud itself. Re-torque after initial engine run to compensate for head gasket compression. Each stud is marked with the ARP stamp as assurance of quality and authenticity.