We want to help make sure you get that project up and going ASAP. We have been taking care of automotive enthusiasts locally and online since 1996, if you need a reputable business to deal with, we are your only choice. Over 100,000+ customers and counting, We know performance! Kit comes with all (10) 10mm head studs, (10) washers, and (10) nuts needed for a direct bolt on, as well as the ARP moly-lube and instruction sheet. Please NOTE: This kit uses the NEW ARP 2000 Material good for 400+ HP builds. ARP® uses a premium grade ARP2000 material that is rated far superior to to “aircraft quality”. Then, each stud is placed vertically in special racks and precisely heat-treated to 220,000-230,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best. 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. It s important to note that 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% (thats ten 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.