ARP Subaru WRX EJ20 & EJ25 Head Stud Kit - 260-4701

About Product About the Brand Vehicle Fitment Product Videos ARP Subaru WRX EJ20 & EJ25 Head Stud KitARP Subaru WRX EJ20 & EJ25 Head Stud Kit Whether its for a full rebuild or some standard maintenance, the proper engine components are needed to make sure your vehicle is running smooth. About ARP They say that to be successful you must identify a need and satisfy it. Back 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 experience for a leading aerospace subcontractor and founded ARP (Automotive Racing Products). In the ensuing years, the firm has 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.