Great Lakes 4x4. The largest offroad forum in the Midwest - View Single Post - Quiet muffler where to get one
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Old April 27th, 2013, 11:10 AM   #7
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Either way it should have been under warranty. Even if he switched sizes and part numbers. I deal with Tenneco(Walker, Dynomax etc.) and if the muffler comes with a lifetime warranty (not all their part number do) then they will warranty it even if they put a different part number on it. As far a size goes that shouldn't matter. Do you know what part number was originally on it or the one he put on it? The higher the first 2 digits in the number the better the muffler. For example a 18216 will be louder than 21046 muffler.
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