Step up the strength in your 99-04 F-150 Lightning with the ARP Pro Series Head Stud Kit. The ultimate in fastner technology and dependability ARP leads the industry in Quality fastners. 1999-2004 Ford Lightning Srp Pro-Series Cylinder Head Stud Kit, Arp 2000, Hex Nuts, These Pro Series Studs From Arp Are Cold-Forged To Ensure Molecular Integrity. They Are Heat-Treated Prior To Thread Rolling And Machining And Are Rated At A Whopping 190,000 Psi.
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