Andy: I ignored that post because it hurt my brain to read.

 

I just installed my own M2 exhaust on my 03 R53, and even though I knew there would be difficulties from what I read from everyone's reviews the price was too good to pass up. The install went pretty good, no directions were included in the box and when I contacted the company they just ignored me...Oh well I figured it out and got it work go on, the only fitment issue is the left tip wasn't welded on straight so the left tip sticks out about 1/8th of an inch less than the right, can I live with it, sure. Other than that it is a fantastic exhaust, the sound is way throatier than the stock exhaust and I can definitely feel the giddy-up when I hit the higher RPM's. I also have an Alta 17% reduction pulley and a K&N CAI installed and all together it is a fantastic combination.