ARP 191-6001 Cylinder Head Fasteners High Performance Chrome Moly - 8740

The ARP 191-6001 cylinder head fasteners are engineered to deliver superior clamping force and reliability in high-performance engine applications. Manufactured from premium 8740 chrome moly steel, these fasteners provide the strength and durability needed to secure cylinder heads under extreme operating conditions.

Key Features:

• Constructed from high-quality 8740 chrome moly steel with tensile strength between 180,000-210,000 psi
• Forged in-house at ARP using only the finest quality materials for consistent performance
• Heat-treated using special vertical racks to ensure complete 360-degree penetration
• Threads rolled after heat treatment to provide up to 10 times longer fatigue strength
• Precision CNC-machined to exacting specifications for perfect fit and function
• Each fastener proudly stamped with the ARP name as your assurance of quality

Why Choose ARP Fasteners:

ARP fasteners are the choice of professional engine builders and racers worldwide. Through rigorous testing, ARP has demonstrated fatigue strength that is ten times superior to competing fasteners. The company's commitment to quality begins with in-house forging and extends through every manufacturing step, including their proprietary heat-treatment process and post-heat-treat thread rolling. This attention to detail ensures that every ARP fastener delivers maximum clamping load, superior fatigue resistance, and the reliability demanded by high-performance applications.

The 8740 chrome moly material is a proven quench and temper steel that offers excellent toughness and adequate fatigue properties for most racing applications. While considered moderate strength compared to exotic super-alloys, 8740 chrome moly provides an outstanding balance of performance, reliability, and cost-effectiveness for the majority of engine builds.