VW Rod Bolts ( 1.8l & 2.0l 8v & 16v)

VW / Audi water cooled 1.8L & 2.0L ARP 104-6004 Connecting Rod Bolts. ARP High Performance Wave-Loc Connecting Rod Bolts, 8740 Chromemoly Steel, The same heat-treated 8740 chrome moly steel is used to make these rod bolts as ARP’s standard High Performance rod bolts.

ARP VW 104-6004 rod bolts

The big difference is in the shank design, with ARP’s exclusive (and patented) Wave-Loc technology providing substantial benefits. Because there are fairly wide tolerances in factory bolt holes, the bolt must be able to 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.


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  • Model: arp_104-6004
  • Manufactured by: ARP

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