ARP 132-6021 Cylinder Head Fasteners High Performance Chrome Moly - 8740

ARP 132-6021 cylinder head fasteners deliver the legendary strength and reliability that engine builders trust for high-performance applications. Manufactured from ARP's proven 8740 chrome moly alloy, these fasteners provide the consistent clamping force critical for maintaining head gasket integrity under demanding conditions.

Premium Manufacturing Process:

• Forged in-house using premium 8740 chrome moly steel for superior strength and fatigue resistance
• Heat-treated on specialized vertical racks ensuring complete 360-degree penetration for uniform material properties
• Threads rolled after heat treatment to provide up to 10 times longer fatigue life compared to cut threads
• Precision CNC-machined to exacting tolerances for consistent fit and performance
• Each fastener proudly stamped with the ARP name as assurance of quality

8740 Chrome Moly Material Properties:

ARP's 8740 chrome moly is a quench and temper steel that delivers tensile strengths between 180,000 and 210,000 psi. While considered moderate strength by today's exotic alloy standards, 8740 offers excellent toughness and fatigue properties for most racing and high-performance street applications. The critical difference with ARP fasteners is the post-heat-treat thread rolling process, which dramatically improves fatigue strength compared to competitors' products.

Application Notes:

These cylinder head fasteners are engineered specifically for applications requiring superior clamping force and reliability. Proper installation procedures, including using ARP Ultra-Torque assembly lubricant and following torque specifications, will ensure optimal performance and longevity. Always verify fitment for your specific engine application before installation.