ARP 141-6401 High Performance Cylinder Head Fasteners Chrome Moly - 8740

ARP 141-6401 cylinder head fasteners deliver professional-grade reliability for demanding engine builds. Manufactured from premium 8740 chrome moly steel, these fasteners are engineered to provide consistent clamping force and superior durability under extreme cylinder pressures and temperatures.

Key Features:

• 8740 chrome moly construction with tensile strength rated between 180,000-210,000 psi
• Forged in-house at ARP using premium quality materials for consistent performance
• Heat-treated using specialized 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 optimal fit
• Each fastener stamped with the ARP name as assurance of quality

About 8740 Chrome Moly Material:

While considered moderate strength by today's modern alloy standards, 8740 chrome moly remains an excellent choice for most performance and racing applications. This quench and temper steel offers good toughness with adequate fatigue properties when threads are rolled after heat-treatment—the standard ARP production practice. The material provides reliable performance at a cost-effective price point, making it ideal for builds where extreme loads don't require exotic super-alloy materials.

ARP fasteners are trusted by professional engine builders and enthusiasts worldwide for their superior fatigue strength and manufacturing quality. When rebuilding or upgrading your cylinder head, ARP fasteners provide the reliability and peace of mind your engine deserves.