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ARP Cylinder Head Stud KitFits Chevrolet/GMC 6.2L/6.5L Detroit DieselIt is for good reason that virtually every top professional enginebuilder relies on ARP Pro Series head studs for their all-out competitionpowerplants. Simply stated, there’s not a better stud setupon the market today. For openers, ARP only uses premium grade 8740 alloy anda proprietary ARP2000® alloy that are rated far superior to “aircraft” quality alloy steels. Secondly, each stud is placed verticallyinto special racks and precisely heat-treated to 190,000 psi forthe 8740 material and 220,000 psi for the ARP2000® material. This procedure ensures complete heat penetration and the resultsare far superior to those lesser quality studs from other manufacturerswho just dump pieces in a basket and hope for the best.
Following heat-treat, each stud is center less ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It’s important to note that lesser quality studs are not even center less ground – the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned – something that won’t happen with inferior quality head studs. ARP studs are thread rolled after heat-treat, which gives them about 2000% (that’s twenty times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it’s tough on tooling, but the results are well worth the extra effort. You will also note that ARP offers specially undercut studs for several engines. This procedure (done only to the shorter studs) more equalizes the “stretch” of both studs, which makes for a more consistent clamping force – and one that compensates forhead gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing! Premium quality 8740 and ARP2000® head stud kits are availablefor most domestic and import applications.
You won’t find a better quality stud on the market from any other source. Look forARP stamped on each stud as your assurance of quality.Clearly, they are the best on the market today, and the favoriteof leading professional engine builders in all forms of racing.
Material: 8740 Chrome Moly
Finish: Black
Origin: USA
Picture is for display purposes and may not be application specific
