ARP 235-4719 Head Stud Kit High Performance Chrome Moly Undercut - 8740 12-Point

The ARP 235-4719 Head Stud Kit represents professional-grade cylinder head fastening technology using premium 8740 chrome moly alloy rated at 200,000 psi. These studs are engineered for high-performance and competition engines where reliability and precise clamping force are critical.

Advanced Manufacturing Process:

• Constructed from premium 8740 chrome moly steel alloy rated at 200,000 psi
• Vertically rack heat-treated for complete and consistent heat penetration
• Centerless ground after heat-treat for exceptional concentricity and straightness
• Thread rolled after heat-treatment for approximately 1000% better fatigue strength
• Undercut design on shorter studs equalizes stretch for more consistent clamping force
• 12-point head design for precise torque application

Performance Benefits:

• Superior clamping force consistency compared to conventional head bolts
• Easier engine assembly with perfect cylinder head and gasket alignment
• Reduced risk of head gasket failure through optimized compression compensation
• Studs stretch only on vertical axis during torquing, eliminating twisting forces
• Complete kit includes hardened parallel-ground washers for even load distribution

Each stud is manufactured to exacting tolerances that ensure cylinder heads and gaskets align perfectly during installation. The undercut design compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal engine sealing. All ARP studs are marked with the ARP stamp as assurance of quality and authenticity.

Installation Note: Studs should be installed finger-tight in a relaxed mode. After initial torquing and engine run-in, re-torque fasteners to compensate for head gasket compression.