For $200 per muffler I don't think you will see any substantial gain over another performance muffler. How much can a muffler possibly do alone? It either restricts air or is free flowing, it sounds like a gimmick to me. :fart:
I've only heard it on a Hemi Ram with long tubes and high-flow cats but it was very good sounding but incredibly loud, you could hear him from over a mile away.