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.
2011 E92 M3 ZCP | EVOLVE Tune | HRE R43 | B&G Sport Springs | Dinan Axle-Back & Intake | Challenge Street X-Pipe | 3D Design Pedals | IND Tri-Stitched Shift/Brake Boots | IND Cosmetics | GTS Door Sills | Euro Sunvisors
Last edited by iamcpap; 06-21-2012 at 02:30 PM.
Reason: add not ass...