Stainless Steel Crusader Marine R009206 Shouldered Bolt
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Exhaust Manifold bolt fits big block GM (Chevy) 7.4-Liter (454 cu.in.) and 8.2-Liter (502 cu.in.) engines.
Shouldered Diameter: 3/8"
Thread Size: 8mm
Overall Length: 2"
Thread Length: 3/4"
Hex head Size: 13mm
OEM Exhaust Manifold Bolts