In the KC area there are not going to be many shops that carry MS6 specific parts like CPE or corksport. Revline can get anything from magnaflow, AEM, injen... about anything from the major companies. Most of your parts will have to come from online unless I can convince chuong, but I doubt that will happen.
As for mod friendly dealerships, Steve Oliver guys are pretty cool, I have been going to them since I bought my car in '06 and all they told me was they would not 'notice' the modifications I had when I came in for regular service, but if I came in with any warranty claims to make the car stock as possible.
