On my 350 I went with a SLP loudmouth 2 muffler, single in/out (no dual exhaust) and the exhaust place tucked it up in the body so you don't see anything. I really love the way it sounds...
-Little louder than stock at idle
-Nice sound for normal driving
-Mean as hell under hard acceleration
My setup wasn't that expensive either. I got the muffler brand new off ebay and the rest was the muffler shop. They also fixed the heat shields on my cats.
My Mustang has flowmasters and they do sound good however, they have a tendency to drone a bit when cruising on the highway.
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1989 Formula - 305TBI/700r4
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