ARP 260-4701 Pro Series Cylinder Head Stud Kit 12-Point Undercut

The ARP 260-4701 Pro Series head stud kit delivers professional-grade engine fastening performance for high-performance and racing applications. These premium studs are engineered to provide superior clamping force and reliability under extreme cylinder pressures.

Advanced Manufacturing Process:

• Constructed from premium 8740 chrome moly steel alloy rated at 200,000 psi tensile strength
• Vertically rack heat-treated for complete and consistent heat penetration throughout each stud
• Centerless ground to exacting tolerances for near-perfect concentricity and straightness
• Thread rolled after heat-treatment for approximately 1000% better fatigue strength than pre-heat-treat threading
• Undercut design on shorter studs equalizes stretch and clamping force for improved head gasket sealing

Performance Benefits:

• 12-point nuts provide multiple engagement positions for easier installation in tight spaces
• Studs install in relaxed mode and stretch only on vertical axis during torquing for more accurate and consistent clamping force
• Precise tolerances allow cylinder heads and gaskets to align perfectly during assembly
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Eliminates the twisting force present when using bolts, resulting in more reliable torque values

Each stud is individually marked with the ARP stamp as assurance of quality and authenticity. This kit represents the fastener choice of top professional engine builders across all forms of motorsports competition.