I bought a used Dinan axle back from a forum member and loved the improvement over the stock exhaust as well as the black tips. When that gets too quiet, add a Challenge Street Pipe. Used Dinan for $1500 + Challenge Street pipe for $995ish is the best sounding exhaust without messing with CEL's and such without being too LOUD. If you wanted LOUD, there are 20 different options that will deafen you.
2008 E90 M3 | Interlagos Blue | Speed Cloth | 6MT - A work in progress...
2011 E92 M3 ZCP - Gone, but not forgotten.
Last edited by iamcpap; 06-21-2012 at 02:30 PM.
Reason: add not ass...