ARP 234-4335 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 234-4335 is a high-performance cylinder head stud kit engineered for serious engine builders who demand maximum reliability and clamping force. Built with premium 8740 chrome moly steel and rated at 200,000 psi tensile strength, these studs deliver professional-grade performance for competition and high-performance street applications.

Key Features:

• Premium 8740 chrome moly steel construction rated at 200,000 psi tensile strength
• 12-point head design for precise torque application
• Vertical rack heat treatment ensures complete and uniform heat penetration
• Centerless ground for exceptional concentricity and perfect alignment
• Thread rolled after heat treatment for 10x better fatigue strength
• Undercut short studs equalize stretch for consistent clamping force
• Hardened parallel-ground washers included for even load distribution
• Wide area flanged head design eliminates need for valve train removal during retorquing

Why Studs Over Bolts:

Head studs provide superior accuracy and consistency compared to bolts. While bolts experience both torsional and tensile stress during installation, studs stretch only along the vertical axis when the nut is torqued, resulting in more accurate and repeatable clamping loads. The undercut design on shorter studs helps equalize stretch across all fasteners, compensating for head gasket compression and reducing the risk of head gasket failure.

Manufacturing Excellence:

Each ARP stud undergoes precision heat treatment in vertical racks—never batch-processed—ensuring consistent properties throughout. After heat treatment, studs are centerless ground through multiple passes to achieve near-perfect concentricity, allowing cylinder heads and gaskets to align effortlessly during assembly. Thread rolling is performed after heat treatment, a costly but critical process that maximizes fatigue resistance.

Trusted by professional engine builders across all forms of motorsports, ARP Pro Series head studs represent the highest quality fasteners available. Each stud is marked with the ARP stamp as your assurance of zero-defect, zero-failure quality standards.