ARP 234-4306 Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 234-4306 is a high-performance cylinder head stud kit engineered for demanding competition and performance applications. Manufactured from premium 8740 chrome moly steel, these studs are precision heat-treated to 200,000 psi tensile strength, significantly exceeding aircraft-quality standards and offering superior clamping force for high-stress engines.

Key Features:

• Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
• 12-point head design with wide-area flange for easy installation and retorquing
• Precision vertical rack heat-treating ensures complete and uniform heat penetration
• Centerless ground after heat-treat for exceptional straightness and concentricity
• Thread rolled after heat-treat for approximately 1000% better fatigue strength
• Undercut shorter studs equalize stretch for consistent clamping force
• Includes hardened, parallel-ground washers for even load distribution
• Allows cylinder head removal and retorquing without valve train disassembly

Why Choose Studs Over Bolts:

Head studs provide superior clamping accuracy compared to bolts because they stretch only along the vertical axis during torquing, eliminating the twisting forces that affect bolts. This results in more accurate and consistent torque readings, better head gasket sealing, and easier engine assembly. The studs install finger-tight and allow perfect alignment of gaskets and cylinder heads during installation.

Manufacturing Excellence:

Each ARP stud undergoes rigorous quality control, including vertical rack heat-treating (not bulk basket processing), centerless grinding with multiple precision cuts, and post-heat-treat thread rolling. These extra manufacturing steps ensure every stud meets ARP's zero-defect, zero-failure quality standard. The undercut design on shorter studs compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal engine sealing.

Trusted by professional engine builders across all forms of motorsports, ARP Pro Series head studs represent the highest quality fastener solution available for serious performance applications. Each stud is stamped with the ARP logo as your assurance of authenticity and quality.