ARP

It all started in the early 1970s, when 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 experience for a leading aerospace subcontractor and founded ARP (Automotive Racing Products). In the ensuing years, they have grown from what was literally a backyard garage workshop into a highly diversified manufacturer with seven operational entities in Southern California with a combined area in excess of 200,000 square feet. These include facilities for forging, heat-treating, machining, thread rolling, shot-peening, metal finishing as well as packaging/warehousing in Santa Paula and Ventura, California.

There are several important elements in the production of specialty fasteners, not the least of which are materials, design, and manufacturing. Extensive backgrounds in mechanical engineering, metallurgy, and stress analysis complement the extraordinary steps taken to produce the very finest products on the market today. ARP's product line contains thousands of part numbers and has expanded to include virtually every fastener found in an engine and driveline. Today's critical diesel fasteners and driveline hardware have been designed stronger than ever before to handle the extreme loads. ARP Head Studs, Main Studs, Connecting Rod Bolts, and Fasteners are ideal for both high-performance builds as well as many stock applications.

OE-head bolt stretching has been a problem for many diesel truck owners. This applies to both those who are into performance as well as owners of stock vehicles. ARP’s head stud kit for diesel truck applications provides the ideal solution to a common problem. Replacing the factory Torque-To-Yield (TTY) head bolts with upgraded ARP Head Studs is a popular upgrade for many Ford 6.0L & 6.4L Powerstroke owners. The 6.0 Super Duty and Excursion are well known for stock head bolts that can stretch and head gasket failures. ARP studs can be an excellent investment for any high-performance Ford Powerstroke, Chevy/GMC Duramax, or Dodge Ram diesel. Head Studs are offered as a standard diesel ARP Head Stud Kit or upgraded Custom Aged 625+ Head Stud Kit. The Custom Aged 625+ Head Studs are the ultimate head stud and are ideal for high-horsepower and competition applications.