This is a grade 8 stainless steel exhaust manifold kit for mounting stock manifolds to the heads on your International V-8 engine. These bolts are grade 8 stainless steel and are made to withstand high heat better than the original bolts. These are ARP 300 Stainless bolts and come with a polished finish. These bolts are much stronger than the stock bolts and are rated at 170,000 psi.
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