Second muffler done at this location. Tommy found the record of the previous Flo Pro install from 2012 which had a perfect tone from the 2006 Vortec 6.0. This time only two options were available in stock for my 2012 6.0 Vortec 3.5” inlet/3.5” outlet, so I chose a generic muffler over a Magna Flow based on price. It is a little louder than I prefer and has quite a drone at freeway cruising speed. But sounds good while most of my use is not at highway speeds. Install in both cases was quick and well done.