ARP 235-4314 Head Stud Kit Chrome Moly Steel - 8740 12-Point

The ARP 235-4314 Head Stud Kit is engineered for high-performance and racing applications where maximum clamping force and reliability are essential. Manufactured from premium 8740 chrome moly steel and rated at 200,000 psi tensile strength, this Pro Series kit delivers superior strength and durability compared to standard head bolts.

Key Features:

• Premium 8740 chrome moly alloy rated at 200,000 psi - far exceeding aerospace quality standards
• Vertical rack heat-treatment process ensures complete and uniform heat penetration throughout each stud
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treatment for approximately 1000% better fatigue strength than pre-heat-treat threading
• 12-point head design for precise torque application
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Undercut shorter studs (where applicable) equalize stretch and provide more consistent clamping force

Why Studs Over Bolts:

Head studs provide significant advantages for performance applications. Unlike bolts that experience torsional twist during installation, studs are installed finger-tight and only experience vertical stretch when torqued. This results in more accurate and consistent clamping force. Studs also make engine assembly easier by allowing cylinder heads and gaskets to align properly and glide into position effortlessly.

Installation Note:

Studs should be installed in relaxed mode (finger-tight, never cranked down with a jammed nut). Always re-torque after initial engine run-in to compensate for head gasket compression.

Trusted by professional engine builders across all forms of motorsports, ARP Pro Series head studs represent the highest quality fastener solution available for competition powerplants.