ARP 202-4202 High Performance Cylinder Head Stud Kit Chrome Moly - 8740 12-Point

The ARP 202-4202 is a high-performance cylinder head stud kit engineered for demanding applications where reliability and precise clamping force are critical. Built from premium 8740 chrome moly alloy steel, these studs deliver 200,000 psi tensile strength, providing superior fastening performance for both street and competition engines.

Advanced Manufacturing Process:

• Precision heat-treated vertically in specialized racks to ensure uniform 200,000 psi tensile strength throughout each stud
• Centerless ground through multiple precision cuts for exceptional concentricity and straightness
• Thread rolled after heat treatment for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Undercut shorter studs equalize stretch characteristics for more consistent clamping force and head gasket compression compensation

Kit Features:

• 12-point head design with wide-area flange for easy installation and removal
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Allows cylinder head retorquing without valve train removal
• Permits use of larger diameter valve springs due to reduced wrenching profile
• Precision tolerances ensure gaskets and cylinder heads align perfectly during assembly

Installation Advantages:

Studs offer significant benefits over conventional head bolts by eliminating torsional stress during installation. Unlike bolts that twist while being torqued, studs should be installed finger-tight and stretch only along the vertical axis when the nut is torqued. This results in more accurate and consistent clamping force, reduced risk of head gasket failure, and faster engine assembly—particularly important for racing applications requiring frequent servicing.

Each ARP stud is stamped with the ARP logo as assurance of quality and is manufactured to meet ARP's zero-defect, zero-failure quality standard. This kit represents the preferred choice of professional engine builders across all forms of motorsports.

Note: After initial torquing and engine break-in, studs should be re-torqued to compensate for head gasket compression.