ARP 235-4308 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 235-4308 is a premium cylinder head stud kit engineered for high-performance and competition engines. Manufactured from ARP's proprietary 8740 chrome moly alloy, these studs are rated at 200,000 psi tensile strength, delivering superior clamping force and reliability under extreme conditions.

Key Features:

• 8740 chrome moly steel construction rated at 200,000 psi
• 12-point head design for precise torque application
• Vertical rack heat-treating process ensures complete and uniform heat penetration
• 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 consistent clamping force
• Includes hardened, parallel-ground washers for even load distribution
• Facilitates precise cylinder head and gasket alignment during assembly

Why Choose Studs Over Bolts:

Head studs provide superior performance compared to bolts because they stretch only along the vertical axis when torqued, eliminating the twisting forces that bolts experience. This results in more accurate and consistent torque readings, better clamping force, and improved head gasket sealing. Studs are especially beneficial for racing applications where frequent disassembly is required.

Installation Notes:

Install studs finger-tight in a relaxed mode—never force them in with a jammed nut. Apply torque to the nuts according to ARP's specifications. Always re-torque after initial engine break-in to compensate for head gasket compression.

ARP's manufacturing process exceeds industry standards at every step. Each stud is individually heat-treated, precision ground, and thread rolled to exacting tolerances that professional engine builders trust for all-out competition powerplants.