Hi, folks, this is actually my first post. I picked up my 2011 GT just over a week ago (with 5 miles on it!), and it hit 500 miles on the way to work this morning. I installed the Hushpower axle-back kit on the car last Thursday, and have put about 300 miles on it. So far, I have yet to make mine drone. I've been driving in town, on the highway, up hills (at low RPM), etc., and can't get any noticeable drone from the car- in fact, it's almost too quiet inside.
Anyway, just thought I'd throw that out there, as this thread really surprised me!