Seller notes

ARP Cylinder Head Stud Kit for Toyota 4AG 20 Valve It so for good reason that virtually every top professional engine builder relies on ARP Pro Series head for their all-out competition powerplants. Simply stated, there's 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. Then, each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi. this procedure ensures complete heat ...

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