Hi-Perf 8740 Complete Rod Bolt Kit for AMC 390 cid (1968-69)

Hi-Perf 8740 Complete Rod Bolt Kit for AMC 390 cid (1968-69)Because factory connecting rods (or aftermarket versions of OEM rods) are used in a variety of applications from rebuilt stock motors to modified powerplants used in circle track, marine and drag racing engines including those with superchargers and or nitrous oxide injection systems ARP offers replacement rod bolts in three different models. All of them are substantially better than the stock OEM and most aftermarket bolts. For the most severe

ARP manufactures a variety of special application-specific bolt and stud kits

The threads are rolled after heat-treating which gives them about 2000% better fatigue strength than most main bolts that are threaded prior to heat-treating

and copy down the length of the fastener prior to and after installation

each stud is centerless ground to makeit as close to perfectly concentric as possible

with threads rolled after heat treat to ensure the optimum fatigue strength

000 psi (which is 15%stronger than Grade 8) and kits come complete with hardened parallel-ground washers

This procedureinvolves about ten very slight cuts and results in an exceptionallystraight part

Far superior to any other main bolts available for use in competition engines

and come in your choiceof black oxide finished chrome moly or rust-proof stainless steel

It has approximately 200% the fatigue life of 8740 chrome moly steel and has a tensile strength of 220

000 psi for the ARP2000® material

Features extra heavy springs for consistent repetition