ARP 135-4001 Pro Series Cylinder Head Studs for Chevy Big Block

ARP Pro Series cylinder head studs are engineered for serious performance applications where reliability is non-negotiable. Manufactured from premium grade 8740 chromoly alloy, these studs are heat-treated to an impressive 200,000 psi tensile strength—far exceeding Grade 8 hardware and standard "aircraft quality" fasteners. Each stud undergoes a vertical heat-treat process in specialized racks to ensure complete and uniform heat penetration throughout the material.

Superior Manufacturing Process:

• Centerless ground after heat-treat for near-perfect concentricity and smooth surface finish
• Thread rolled after heat-treatment for approximately 1000% better fatigue strength compared to studs threaded before heat-treat
• Precision tolerances allow cylinder heads and gaskets to align effortlessly during assembly
• Premium quality parallel ground washers ensure even load distribution
• Conventional hex nuts included for reliable, repeatable clamping force

Application: This complete cylinder head stud kit is designed for select Chevrolet big block engines including cast OEM cylinder heads, aluminum factory heads, and early Bowtie cylinder heads. ARP Pro Series studs are the preferred choice of professional engine builders for high-performance and competition engines where head gasket integrity is critical.

The superior clamping force and fatigue resistance of these studs help maintain consistent head gasket seal under extreme cylinder pressures, making them ideal for naturally aspirated, supercharged, or turbocharged applications.