ARP 202-4304 Head Stud Kit 8740 Chrome Moly 12-Point High Performance

The ARP 202-4304 is a premium head stud kit engineered for high-performance and competition engines. Manufactured from ARP's 8740 chrome moly alloy rated at 200,000 psi tensile strength, these studs deliver exceptional clamping force and reliability far exceeding standard fasteners.

Superior Manufacturing Process:

• 8740 chrome moly steel construction with 200,000 psi tensile strength
• Vertical rack heat-treatment ensures complete and consistent heat penetration
• Centerless ground after heat-treat for precise concentricity and straightness
• Thread rolled after heat-treatment for 10x better fatigue strength
• 12-point head design for secure engagement and accurate torque application
• Undercut shorter studs equalize stretch for consistent clamping force

Performance Advantages:

ARP studs provide superior cylinder head installation compared to bolts. Studs allow the cylinder head and gasket to align perfectly during assembly, and 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 and superior head gasket sealing. The undercut design on shorter studs compensates for head gasket compression, helping prevent blown gaskets in high-performance applications.

Each kit includes hardened, parallel-ground washers to ensure even load distribution. These fasteners are trusted by professional engine builders across all forms of racing and represent the highest quality head stud solution available. Install studs finger-tight in a relaxed mode, then torque the nuts to specification. Re-torque after initial engine run-in to compensate for gasket compression.