ARP 132-4001 Cylinder Head Stud Kit Chrome Moly Steel - 8740

The ARP 132-4001 Pro Series head stud kit represents the pinnacle of cylinder head fastening technology, trusted by professional engine builders in all forms of racing. These premium fasteners are engineered to deliver uncompromising strength and reliability for high-performance and competition applications.

Premium 8740 Chrome Moly Construction:

• Manufactured from premium grade 8740 chrome moly alloy, rated superior to aircraft quality materials
• Heat-treated vertically in specialized racks to 200,000 psi for complete heat penetration and consistent results
• Thread rolled after heat-treat for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Centerless ground through multiple precision cuts to ensure exceptional straightness and concentricity

Engineering Advantages:

• Hex head design for reliable wrenching
• Studs provide more accurate and consistent torque loading compared to bolts
• Allows cylinder heads and gaskets to align perfectly during assembly
• Studs stretch only on the vertical axis during torquing, eliminating the twisting forces that affect bolts
• Undercut shorter studs (where applicable) equalize stretch between studs for more consistent clamping force

Kit Includes:

• Complete stud kit for application
• Hardened parallel-ground washers for even load distribution and accurate torque readings

Each ARP stud is stamped with the ARP logo as assurance of quality and is manufactured to exacting tolerances that meet ARP's zero-defect, zero-failure quality standard. The precision manufacturing ensures that gaskets and cylinder heads glide into position smoothly during assembly. Installation should be performed finger-tight in a relaxed mode, and all fasteners should be re-torqued after initial engine operation to compensate for head gasket compression.