We have one set of barely used Mercury exhaust manifolds for sale. These have extremely low hours and come with risers and hoses. These are like new and would be perfect for that 496 you have. Shipping will be quoted according to zip code. This set is cast iron. Please let us know if you have any further questions.

is the 496 and 454 mark IV exhaust interchangeable?

thanks
Ned

Theoretically yes, they share the same bolt pattern and should bolt right up. They although are different motors and the heads on one motor may sit higher than the other thus making your riser exit in a different location. I cannot say they will fit your exact application, I suppose if you had a lot of hose running to the transom you could fudge a couple inches, are they stock locations on the exhaust tips?

I will be calling you in the morning for a price on the aluminum set. Thanks

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