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Has various GM Uses
This is the best outcome for all
1964-67 Chevy Chevelle
as you can see
The heater hose connects directly to this component
Exhaust Manifold Gasket: Olds 403 for Headers - Set Has various GM UsesThese premium exhaust gaskets from Mr. Gasket are designed and constructed to improve the sealing of exhaust header flanges. Unlike standard exhaust gasket material, Ultra Seal exhaust gaskets incorporate a graphite impregnated facing and a steel expanded metal core that reinforce and increase the tensile strength. This allows the gaskets to conform to warped flanges, giving them better sealing capabilities without deteriorating or cracking under the