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I have a set of manifolds for later 5.0 and 5.7 Camaro and Firebird. They are part 14094064 and 1409463. These are the High Output manifolds. They have been coated with Jet-Hot 1300 "extreme" ceramic coating with a cast-iron topcoat color. They have never been used or installed. Please not I've highlighted in red where there is a very small ding/dent to back of passenger manifold. This was there before the coasting and shouldn't be an issue but could easily be ground down if desired/needed. Was going to use them on a project but decided to go a different direction. $500 for both + shipping (they are about 25 lbs). Can pickup if you're in the Boston area. Price is less than the total cost of the coating itself.