ARP 107-6003 Connecting Rod Bolt Kit Chrome Moly - 8740

The ARP 107-6003 is a high-performance connecting rod bolt kit manufactured from ARP's proven 8740 chrome moly alloy. Designed to replace the weakest link in any connecting rod assembly, these fasteners deliver the reliability and strength that professional engine builders and racers demand.

Why ARP Rod Bolts?

ARP rod bolts are the gold standard in connecting rod fasteners, chosen as original equipment by leading rod manufacturers worldwide. Testing has proven that ARP rod bolts offer up to ten times the fatigue strength of competing fasteners, making them the trusted choice for high-performance and racing applications.

8740 Chrome Moly Material

The 8740 chrome moly alloy is a quench and temper steel that delivers tensile strengths between 180,000 and 210,000 psi. While considered moderate strength by today's standards, it offers excellent toughness and adequate fatigue properties for most racing applications, making it the most cost-effective solution for engines operating within normal performance parameters.

Key Features:

• Forged in-house at ARP facilities using premium quality materials
• Heat-treated on special vertical racks for complete 360-degree penetration
• Threads rolled after heat-treat for up to 10 times longer fatigue life
• Precision CNC-machined to exacting specifications
• Complete kit includes all necessary fasteners
• ARP name stamped on each bolt as assurance of authenticity

Wave-Loc Design Benefits:

• Wave-Loc surface contacts rod and cap for optimal alignment and reduced fluctuating stress
• Provides interference fit of .001 to .005 inches for OEM connecting rods
• Superior material grain flow compared to knurled designs
• Eliminates galling and scoring through smooth contact surfaces
• No sharp edges or stress risers that compromise strength

Important Maintenance Note:

Monitor bolt stretch regularly and replace any bolt that has permanently elongated by .0005 inches to ensure continued reliability and safety.