(Cummins 5.9L Dsl 12V) Built for the (94-98) Dodge Ram 2500.
Obtaining optimum cylinder head-to-block sealing is critical in small displacement engines employing high compression pistons or power adders like turbochargers, nitrous oxide, and superchargers.
ARP head studs are popular among leading Sport Compact/Import racers.
ARP uses a premium grade 8740 alloy rated far superior to 'aircraft' quality.
Each stud is heat-treated to 200,000 psi.
Following heat-treat, each stud is ground centerless to achieve close to perfect concentricity.
This procedure involves about ten slight cuts and results in an exceptionally straight part.
Lesser quality studs are not centerless ground; the material is thread rolled in bar stock form mostly before heat-treat when the material is easier to machine.
ARP studs are manufactured to exacting tolerances, allowing gaskets and cylinder heads to glide into position and align perfectly, which won't happen with inferior quality head studs.
ARP studs are thread rolled after heat-treat, giving them about 1000% better fatigue strength than those threaded prior to heat-treat.
ARP offers specially undercut studs for several engines.
This procedure, done only to the shorter studs, equalizes the 'stretch' of both studs, creating a more consistent clamping force that compensates for head gasket compression when the head is installed.
This helps prevent blown head gaskets and assures optimum sealing.
