I appreciate everyone's thoughts, Thanks. I have not had the check engine light turn on...not drastic of a mod to do this. If i screwed with the O2 sensors (eg. removed-relocated them) then it probably would.

The reason I purchased new tips is because I did not want to modify the old exhaust system...just in case the dealership try's to pull a fast one. I can drop the old exhaust back in the car in minutes. 3 bolts and a couple of hangars...BTW, the rear rubber hangers say "AMG" on them...I thought that was cool.

I will try to get a sound clip soon.