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I does draw in hot under hood air, so I don't know how benificial that is.
MAC does make quality products. I have a set of their shortie headers on my Stang that have been on there for about 12 years and even though the bolts have worked loose a couple of times, the have never blown a gasket. Mine are nickle plated (that's how they did it back in the day before the ceramic coating got big) and have turned a little blue, but have never even though about rusting.
Jimmy
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