ARP 234-4705 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 234-4705 head stud kit delivers professional-grade reliability with premium 8740 chrome moly steel construction rated at 200,000 psi tensile strength. Engineered for high-performance and competition engines, these studs provide superior clamping force and fatigue resistance compared to standard head bolts.

Key Features:

• Premium 8740 chrome moly alloy steel construction with 200,000 psi rating
• Vertical heat-treatment process ensures complete penetration and consistent strength
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treatment for 10x better fatigue strength
• Undercut design on shorter studs equalizes stretch for more consistent clamping force
• 12-point nut design for precise torque application
• Includes hardened parallel-ground washers for even load distribution

Performance Benefits:

ARP's precision manufacturing process ensures cylinder heads and gaskets align perfectly during assembly. Unlike bolts which experience torsional stress during installation, studs stretch purely on the vertical axis when torqued, delivering more accurate and consistent clamping force. The undercut design helps compensate for head gasket compression, reducing the risk of gasket failure and maintaining optimal cylinder sealing under extreme conditions.

Each stud is manufactured to exacting tolerances with ARP stamping for quality assurance. The kit includes everything needed for professional installation, making it the preferred choice of top engine builders across all forms of motorsports.

Note: Studs should be installed finger-tight in a relaxed state, never cranked in using a jammed nut. Re-torque after initial engine run to compensate for head gasket compression.