When I ran Mufflers I had duals they where the Thrush turbos 400 and also had a set of 300 series Both sounded Great not to loud but nice deep tone and everyone thought I had that vthing lol And at the time when i was driveing on the street and just racing on the week ends ETs where no different with or with out them. & stock 3:08 gears at that time. just more food for thought & run what you like/makes you happy. To me the flow masters are to heavy and i don't care for the sound. But I have never heard a set on a L6. I have heard the super trap mufflers They didn't sound to bad But i still liked my Thrush better . But everyone has their own taste. hope this helps.}[oooooo]
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NovaMan/Twisted6/Larry