(3/8" UNC Hexagon Head). 2" Bolts (Hexagon Head). COR-1.1.1 Chevrolet Corvette V8. Corvette Exhaust Header Bolts. The Bolts Are Longer. Exhaust Manifold Bolts. Edlebrock Cylinder Head Exhaust Bolts. 1" Bolts (Hex Head).
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