flowmaster 40
Not sure about the difference between the 40 delta flow and the super 40, but I have the 40 delta flow si/do and it really isnt that loud. If you are looking for a loud flowmaster I have been told the super 44 is the loudest they have to offer.
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I have a Super 44 on my Chevy. They are louder then the 40 and have a really nice rumble. I love it for about 45 min, but driving longer then that starts to get annoying. I was debating between a 40 and 44 for the Ford. Not sure what I'm going to go with. The Deltas are supposed to have less drone inside the cab so that's most likely what I will get. I love the flowmaster sound and I noticed a big difference between the 44 and stock muffler power wise on the Chevy.


