They say that to be successful, you must identify a need and satisfy it. Back in the early 1970s, racing enthusiast Gary Holzapfel saw that many of his friends' broken engines were caused by fastener failure. At the time, there were no commercially available studs and bolts up to the challenge, so Holzapfel called upon his many years of fastener making. The result is the ARP Head Stud Kit 12PT Nut for the Nissan RB30 & RB30ET with 1/2" studs – engineered to withstand the intense demands of high-performance builds. Culture Automotive is proud to offer these premium kits, reinforcing our dedication to providing top-tier parts and exceptional experiences, all built by car people, for car people.