ARP 190-4002 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

The ARP 190-4002 cylinder head stud kit delivers professional-grade engine fastening performance using premium 8740 chrome moly steel construction. Engineered for high-performance and racing applications, these studs provide superior clamping force and reliability compared to standard head bolts.

Advanced Manufacturing Process:

• Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
• Vertical rack heat treatment ensures complete and consistent heat penetration throughout each stud
• Centerless ground after heat treatment for exceptional concentricity and straightness
• Thread rolled after heat treatment for 10x better fatigue strength versus pre-heat-treat threading
• Specially undercut shorter studs equalize stretch for consistent clamping force

Performance Benefits:

• Hex head design with wide-area flange eliminates need for valve train removal during retorquing
• Precise tolerances allow cylinder heads and gaskets to align perfectly during assembly
• Superior vertical-axis loading compared to bolts, which twist during installation
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Helps prevent head gasket failures through optimized compression compensation

Each ARP stud is stamped for authenticity and meets the company's zero-defect, zero-failure quality standard. The stud design simplifies engine assembly and provides more consistent torque loading than traditional head bolts, making these fasteners the choice of professional engine builders across all forms of motorsports.

Installation Note: Studs should be installed finger-tight in a relaxed mode, never cranked down with a jammed nut. Always re-torque after initial engine run-in to compensate for head gasket compression.