Bark too much for bite! Which Muffler?
I just swapped out the compression bent x-pipe system with Flowmaster 50 series mufflers for a mandrel bent x-pipe system with turbo mufflers. The turbo mufflers have a smaller case than the 50 series Flowmasters so I was not sure what to expect and though I might re-use the flowmasters.
Anyway, the turbo mufflers have a deeper smoother sound at idle and cruise that overall is quite a bit quieter. Also, there is no difference in the power as measured by the butt dyno. I drive the Cuda a lot ~7.5K miles per year so the lower overall sound level will be a welcome change.
I also had a flowmaster 50 series cat back system on my Dakota that rotted out after 7 years and was replaced last year with a Dynomax cat back system that included the turbo muffler. Though the overall volume of sound did not change much (it was relatively quite with the 50 Series SUV muffler) the turbo muffler on the truck had the same deeper and smoother sound.
The other thing you can do to take a lot of bark out of what you have is to install a cross over. An H-pipe kit is about $40 from Summit or Jegs and is a fairly simple install, just cut the pipes slip in the tees and the cross pipe and you are done. An x-pipe will give you more power but is much more involved and will require some welding.