Just had the local BMW dealer install a Dinan exhaust "system" on my 05. What a joke. $2600 Cdn (+installation) gets you 2 mufflers (i.e., not a full cat-back system) and some chrome exhaust tips. In retrospect, I now know why Dinan just shows a picture of the exhaust tips....because they are embarassed at charging what they do for this equipment. To add insult to injury, the install requires you to cut off the old mufflers so that you can then clamp on the new "high performance, Dinan engineered" units.....nice. Oh, and the much touted perfromance lift.....doubt it. My own fault, but I still feel ripped off.