ARP- 2013-2017 Coyote Head Stud Kit *** CURRENTLY ON BACK ORDER *** These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 190,000 psi. The Pro series kits are also... MSRP: Was: Now: $384.64 Add to Cart