ARP 204-4701 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

The ARP 204-4701 High Performance Head Stud Kit delivers professional-grade engine fastening technology for serious performance applications. Engineered with ARP's premium 8740 chrome moly alloy steel, these studs are heat-treated to 200,000 psi tensile strength—significantly exceeding aircraft quality standards and providing superior clamping force for high-performance engines.

Advanced Manufacturing Process:

• 8740 chrome moly steel construction heat-treated to 200,000 psi
• Vertical rack heat-treatment ensures complete, uniform heat penetration
• Centerless ground for exceptional concentricity and straightness
• Thread rolled after heat-treat for 10x better fatigue strength
• Undercut studs provide more equalized stretch for consistent clamping force
• 12-point nuts with hardened, parallel-ground washers included

Key Benefits:

• Precise manufacturing tolerances allow cylinder heads and gaskets to align perfectly during assembly
• Studs provide more accurate torque loading than bolts by stretching only on the vertical axis
• Undercut design compensates for head gasket compression, helping prevent blown gaskets
• Superior clamping consistency reduces risk of head gasket failure
• Thread rolling after heat-treat dramatically improves fatigue resistance over conventional manufacturing

ARP head studs are the preferred choice of professional engine builders across all forms of motorsports. Each stud is manufactured to exacting tolerances that ensure proper alignment and optimal engine sealing. The included hardened washers distribute load evenly and provide accurate torque readings. Studs should be installed finger-tight in a relaxed mode, then torqued to specification, and re-torqued after initial engine run-in to compensate for gasket compression.

This kit represents ARP's commitment to zero-defect, zero-failure quality standards and provides the reliability demanded by competition engines and high-performance street applications.