ARP 255-6422 Cylinder Head Fasteners for High-Performance Engines

The ARP 255-6422 cylinder head fasteners are precision-engineered fasteners designed to provide superior clamping force and reliability in high-performance engine applications. These fasteners are manufactured from ARP's premium materials and undergo rigorous quality control to ensure consistent performance under extreme conditions.

Key Features:

• Forged in-house at ARP using premium quality materials for exceptional strength
• 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 life
• Precision CNC-machined to exacting tolerances for consistent performance
• Engineered specifically for optimal reliability in demanding applications
• Superior fatigue resistance compared to OEM and competitor fasteners

Why Choose ARP Fasteners:

ARP is the industry leader in high-performance fastener manufacturing, trusted by professional engine builders and racers worldwide. Each fastener is proudly stamped with the ARP name as your assurance of quality. ARP's proprietary manufacturing processes, including post heat-treat thread rolling, deliver fasteners with superior fatigue strength—testing has demonstrated up to ten times the fatigue resistance of competing products. When engine reliability matters most, ARP cylinder head fasteners provide the clamping force and durability required for high-performance and racing applications.

Installation Note: Always follow ARP's installation instructions and use the recommended lubricant to achieve proper torque values and clamping force. Proper installation is critical for fastener performance and engine reliability.