ARP 153-6001 Connecting Rod Bolt Kit Chrome Moly - 8740

The ARP 153-6001 is a high-performance connecting rod bolt kit manufactured from premium 8740 chrome moly steel. Designed to replace the weakest link in any connecting rod assembly, these precision-engineered fasteners deliver the reliability and strength demanded by serious racers and engine builders.

Premium 8740 Chrome Moly Construction:

ARP's 8740 chrome moly material is a proven quench and temper steel capable of delivering 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 when threads are rolled after heat treatment—a standard ARP production practice that provides up to 10 times longer fatigue strength compared to competitor fasteners.

Advanced Manufacturing Process:

• Forged in-house at ARP facilities using only the finest quality materials
• Heat-treated using special vertical racks to ensure complete 360-degree penetration
• Threads rolled after heat-treat to maximize fatigue strength and service life
• Precision CNC-machined to exacting specifications for consistent performance
• Each bolt proudly stamped with the ARP name as assurance of quality

Wave-Loc Technology (where applicable):

Select ARP rod bolts feature the patented Wave-Loc surface design, which provides superior material grain flow compared to traditional knurled bolts. The Wave-Loc surface contacts the rod and cap for optimum alignment while reducing fluctuating stress, actually strengthening the rod itself. This design provides an interference fit range of .001 to .005 inches for OEM connecting rods, accommodating wide factory tolerance ranges while virtually eliminating galling and scoring through smooth contact surfaces.

Maintenance and Service Life:

For maximum reliability, it is critically important to monitor the stretch of each bolt and replace it when permanent elongation reaches .0005 inches. This maintenance practice ensures consistent clamping force and prevents catastrophic failure. The 8740 chrome moly material offers excellent resistance to stress corrosion and hydrogen embrittlement when proper installation procedures are followed.

ARP connecting rod bolts are trusted by leading connecting rod manufacturers as original equipment, and are the preferred choice of professional engine builders who demand nothing but the best in fastener technology.