ARP 144-6421 Wave-Loc 8740 Chrome Moly Connecting Rod Bolts 2-Piece

ARP 144-6421 connecting rod bolts are engineered to be the strongest link in your engine's rotating assembly. Manufactured from 8740 chrome moly steel and featuring ARP's innovative Wave-Loc design, these high-performance fasteners deliver superior clamping force and fatigue resistance for demanding racing applications.

Wave-Loc Technology Advantages:

• Wave-Loc surface contacts rod and cap for optimal alignment and reduced fluctuating stress
• Provides secure interference fit (.001 to .005) that accommodates factory rod bolt hole tolerances
• Superior grain flow pattern compared to traditional knurled bolts eliminates stress risers
• Smooth contact surface virtually eliminates galling and scoring of connecting rod material
• Strengthens the connecting rod itself by improving stress distribution

ARP Manufacturing Excellence:

• Forged in-house from premium 8740 chrome moly steel for tensile strength of 180,000-210,000 psi
• Heat-treated using vertical racks to ensure complete 360-degree penetration
• Threads rolled after heat-treatment for up to 10 times greater fatigue strength
• Precision CNC-machined to exacting tolerances for consistent performance
• Each bolt proudly stamped with ARP name as assurance of quality

About 8740 Chrome Moly Material: This proven alloy steel offers excellent toughness and adequate fatigue properties for most racing applications. As a quench and temper steel, 8740 chrome moly provides reliable performance with good resistance to stress when properly installed and maintained.

Kit Contents: 2 pieces

Important: Monitor bolt stretch regularly and replace when permanent elongation exceeds .0005 inch to maintain optimal clamping force and reliability.