Tee-Dub hit the nail on the head.
I have seen, heard, and witnessed a lot of exhausts, but by far has been the MadDad Euro Street Series. It's a deeper version of the Berk Race to me.
I have the MadDad street with the catless AR 4" downpipe.... and well, you could say my car sounds different
Quite a few of the European forum guys have heard my car and can vouch. I hopefully will have a dyno video to post soon so you can hear it.