ARP 133-6022 High Performance Cylinder Head Fastener Set

The ARP 133-6022 cylinder head fastener set delivers the precision engineering and materials quality that professional engine builders demand. Manufactured from premium 8740 chrome moly steel, these fasteners provide reliable clamping force for high-performance and racing applications where cylinder head retention is critical.

Premium Manufacturing Process:

• Forged in-house at ARP using aerospace-quality materials
• Heat-treated with special vertical racks to ensure complete 360-degree penetration
• Threads rolled after heat treatment for up to 10 times longer fatigue life
• Precision CNC-machined to exacting tolerances
• Each fastener stamped with ARP name as assurance of quality

8740 Chrome Moly Material:

This quench and temper steel delivers tensile strengths between 180,000 and 210,000 psi, providing excellent fatigue properties for most racing applications. The 8740 alloy offers a proven balance of strength, toughness, and reliability that has made it an industry standard for performance engine assembly.

Superior Fatigue Strength:

Testing has demonstrated that ARP fasteners exhibit up to ten times the fatigue strength of competing products. This exceptional durability comes from ARP's proprietary manufacturing process, particularly the post-heat-treat thread rolling operation that work-hardens the thread surfaces and eliminates stress risers.

ARP fasteners are the choice of professional engine builders and racers who refuse to compromise on quality. When properly installed with ARP Ultra-Torque assembly lubricant, these fasteners provide consistent, repeatable clamping loads that protect your engine investment.