ARP 144-4201 Head Stud Kit for Mopar "A" 12pt ymm_71 Specifically designed to interface with

Specifically designed to interface with AEM engine management systems

Operating Temp: -40C to 135C / -40F to 275F

Cast Iron/Steel Hub Drill Bit Size (actual dim

Flange Inside Diameter 2

ARP 144-4201 Head Stud Kit for Mopar "A" 12pt ymm_71 Specifically designed to interface withIt is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all out competition powerplants. Simply stated, theres not a better stud setup on the market today. For openers, ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Each stud is placed vertically in special racks and precisely heat treated to 200, 000 psi. This procedure ensures complete heat