ARP 151-6021 Cylinder Head Stud Kit High Performance Chrome Moly - 8740

The ARP 151-6021 cylinder head stud kit delivers the superior clamping force and reliability that engine builders demand. Manufactured from premium 8740 chrome moly steel, these studs provide the consistent torque retention and fatigue resistance necessary for high-performance and racing applications.

Why Choose ARP Cylinder Head Studs:

• Forged in-house at ARP facilities using only the finest quality materials
• Heat-treated using special vertical racks to assure complete 360-degree penetration for uniform strength
• Threads rolled after heat-treat to provide up to 10 times longer fatigue life compared to cut threads
• Precision CNC-machined to exacting specifications for optimal fit and performance
• Specially designed for optimum reliability and clamping force in demanding applications

8740 Chrome Moly Material:

ARP's 8740 chrome moly is a proven material with excellent toughness and adequate fatigue properties for most racing applications. This quench and temper steel can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi. When threads are rolled after heat-treatment—as is standard ARP practice—the material exhibits significantly improved fatigue resistance and service life.

Each fastener is proudly stamped with the ARP name as your assurance of quality and performance. These studs provide the reliability and consistency that professional engine builders and racers trust for critical cylinder head clamping applications.