The stock bolts on the 3rd-gen Cummins manifold are prone to breaking from stress and, even on a stock truck, aren’t up to the task. However, these gorgeous ARP 772-1004 stainless steel bolts are rated at 170,000 psi to provide a substantial extra margin of safety over Grade 8 and other hardware. Stock up on these truly maintenance-free bolts so you’ll have them when needed.
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