Quote: I have flowmasters and they are rather loud in the cabin area. Any suggestions on something quieter without compromising performance.?
Use the largest muffler case size that will fit, regardless of which brand you use. If you can fit a 21"x9" oval muffler, use it instead of a 14"x9".
Personally, the DynoMax Ultra Flow Welded are a faveorite of mine, but I tried the Thrush Welded (basically a cheaper version of the above) and they are quieter with the same basic design.
