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What’s the difference between the Grade 5 bolt on the left, the Grade 8 in the center, and the ARP head stud on the right, besides the cool colors? While all three will thread into the same 7⁄16-inch hole, metallurgy and the way they are constructed make the Grade 8 bolt stronger than the Grade 5 and the ARP stud multiple times stronger than either. View Related Article
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