ARP 251-6202 Connecting Rod Bolt Kit Pro Series - ARP2000

The ARP 251-6202 is a complete connecting rod bolt kit featuring ARP2000 alloy steel fasteners designed to eliminate the weak link in your connecting rod assembly. These pro series bolts deliver superior fatigue strength—up to 10 times greater than competing fasteners—making them the choice of professional engine builders and racers worldwide.

ARP2000 Material Advantages:

ARP2000 is a premium alloy steel heat-treated to achieve clamping loads at 220,000 psi, offering significantly greater strength than standard 8740 chrome moly. This material provides excellent resistance to stress corrosion and hydrogen embrittlement when properly installed, making it ideal for high-performance street, short track, and drag racing applications in both steel and aluminum connecting rods.

Key Features:

• Forged in-house at ARP using premium quality materials for consistent performance
• Heat-treated using special vertical racks to ensure complete 360-degree penetration
• Threads rolled after heat-treat to provide up to 10 times longer fatigue strength
• Precision CNC-machined to exacting specifications for perfect fitment
• Each bolt proudly stamped with the ARP name as assurance of quality

Wave-Loc Technology (where applicable):

• Wave-Loc surface contacts the rod and cap for optimum alignment and reduction of fluctuating stress
• Provides interference fit of .001 to .005 inches to accommodate factory rod bolt hole tolerances
• Superior material grain flow compared to knurled bolts that create stress risers
• Virtually eliminates galling and scoring through smooth contact surface

Maintenance Note:

Monitor bolt stretch regularly and replace any bolt that has permanently elongated by .0005 inches to maintain optimal clamping force and connecting rod integrity.