ARP Main Stud Kit
It is for good reason that virtually every professional engine builder relies on ARP® main studs for their all-out competition powerplants. Simply stated, there’s not a better stud setup on the market today.
Following heat-treat, each stud is centerless 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. Lesser quality studs are not even centerless 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 1000% (that’s ten times) better fatigue strength than those studs that are threaded prior to heat-treat. This strength makes them reusable..