Volkswagen / Audi Super Vee (Cap screw type) M9 ARP 104-6003 Connecting Rod Bolts.
ARP2000 Pro Series Wave-LOC Rod Bolts.
For severe applications, ARP has developed the “Pro” Series Wave-Loc bolts in conjunction with aftermarket I-beam rods.
These ultra heavy-duty rod bolts are made from a special material designated ARP2000.
It has approximately 200% the fatigue life of 8740 chrome moly steel and has a tensile strength of about 220,000 psi, capable of more than 12,000 lbs.
clamping force.
Because there are fairly wide tolerances in factory bolt holes, the bolt must fit snugly and a knurl is applied.
Unfortunately, these knurls cut deep into the bolt material, leaving sharp edges and enormous “stress risers” that promote failure.
That’s why ARP developed the ARP Wave-Loc design that features symmetrical waves and provides an effective interference fit without creating stress risers in the bolt or the rod.
