ARP 235-4309 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 235-4309 High Performance head stud kit delivers professional-grade fastening reliability for demanding engine applications. Engineered with premium 8740 chrome moly steel, these studs provide exceptional strength and durability for high-performance and competition engines.

Superior Manufacturing Process:

• Premium grade 8740 alloy rated at 200,000 psi tensile strength
• Vertical rack heat-treatment ensures complete and consistent heat penetration
• Centerless ground for near-perfect concentricity and exceptional straightness
• Thread rolled after heat-treat for 10x better fatigue strength
• 12-point head design for positive engagement and accurate torque application

Performance Benefits:

• Studs provide more accurate and consistent torque loading compared to bolts
• Allows cylinder heads and gaskets to glide into perfect alignment during assembly
• Undercut shorter studs equalize stretch for consistent clamping force
• Helps prevent head gasket failure through optimized compression compensation
• Wide-area flanged head eliminates need for valve train removal during retorquing

Kit Includes:

• Complete stud set manufactured to exacting tolerances
• Hardened parallel-ground washers for even load distribution
• 12-point nuts for precise torque application

Each ARP stud is stamped with the ARP logo as assurance of quality. These fasteners meet ARP's zero-defect, zero-failure quality standard and are the choice of professional engine builders across all forms of racing. Studs should be installed finger-tight in a relaxed mode, then torqued to specification. Always re-torque after initial engine run to compensate for head gasket compression.