ARP 251-6402 Connecting Rod Bolt Kit Pro Wave-Loc Series - ARP2000

The ARP 251-6402 is a complete connecting rod bolt kit featuring ARP2000 alloy steel fasteners with the innovative Wave-Loc design. These precision-engineered bolts are specifically designed to eliminate the weak link in connecting rod assemblies, providing superior strength and reliability for high-performance racing applications.

ARP2000 Material Advantage:

ARP2000 alloy steel is heat-treated to achieve a clamping load at 220,000 psi, offering significantly greater strength than standard 8740 chrome moly fasteners. This premium material is widely used in short track and drag racing applications for both steel and aluminum connecting rods, providing an ideal balance of strength, reliability, and cost-effectiveness.

Wave-Loc Technology Benefits:

• Patented Wave-Loc surface design contacts rod and cap for optimal alignment and stress reduction
• Provides secure interference fit (.001 to .005 range) accommodating wide OEM rod bolt hole tolerances
• Superior material grain flow compared to knurled designs that create stress risers
• Eliminates galling and scoring through smooth contact surfaces
• Strengthens the connecting rod itself by reducing fluctuating stress

ARP Manufacturing Excellence:

• Forged in-house using premium quality materials with strict quality control
• Heat-treated using vertical racks ensuring complete 360-degree penetration
• Threads rolled after heat-treat for up to 10 times greater fatigue strength
• Precision CNC-machined to exacting specifications
• Each bolt proudly stamped with ARP name as quality assurance

Maintenance Note: Monitor bolt stretch regularly and replace when permanent elongation reaches .0005 inch to maintain optimal performance and safety.