Best Exhaust system for 2003 BMW M3 Convertible?

What is the best exhaust system out there for a 2003 bmw M3 convertible? The best sounding that is???

thanks

Best Exhaust system for 2003 BMW M3 Convertible?avast

STOCK is best dumbass

Best Exhaust system for 2003 BMW M3 Convertible?ducati

Kreissieg
eisenhaus.
Scorpion and Kromer Kraft both make nice stainless systems for the M3, replacing that super heavy stock muffler also helps alot. Call someone that does strictly BMW performance like, Turner Motorsports, Bimmerworld or Dinan
depends how loud you want it and want kind of sound you like from it,

deep sport sound good preformence and slightly louder then stock:

BORLA Exhaust System for bmw m3 convertible

http://www.borla.com

or

Top-of-the-line f1 racing muffler (very loud!) best preformece you will get out of a m3 muffler:

Kreissieg Cat-back F1 VT Exhaust

http://www.kreissieg-usa.com
listen video clips on youtube, decide for yourself.