Wehrli Custom Fabrication - WCFab » ARP Fasteners

Automotive Racing Products (ARP®) was founded in1968 by racing enthusiast Gary Holzapfel when he recognized 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. In the years that followed, ARP has grown into a highly diversified manufacturer with five operational entities in Southern California with a combined area in excess of 148,000 square feet. These include forging, machining, finishing and packaging / warehousing facilities in Santa Paula and Ventura, California. Today, ARP’s product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, IMSA, NASCAR and NHRA drag racing and marine applications. In addition to its core automotive business, ARP has an Aerospace Division, and is one of the very few companies in the world fully licensed by the United States Government to manufacture MS-21250 fatigue rated fasteners. All ARP fasteners are proudly made in the USA to the industry’s highest standards. ARP also supports racers through generous contingency awards programs with many racing programs.