Originally Posted by kitw
I didn't like mine, and sold it. It was built nicely, but it didn't sound great. I thought the Akrapovic sounded better, and a lot less raspy. I didn't think the BMW Performance exhaust got loud enough, either.
Weren't you pairing the M Performance exhaust with Turner Test pipes? I'm glad you were one of the pioneers on doing this, saved me some money. It doesn't play well with aftermarket pipes from what I'm hearing.
Mine got noticeably louder also. Starting around 3K is where I notice the increase...still no drone.