4th Gear Poster
Join Date: Apr 2013
Location: Southern Oregon
It'll be awhile before I can do that, threw a rod a couple of weeks ago.
That said, I haven't noticed any significant drone even going uphill. I don't have any local roads I can do 60mph uphill though, but I get what you're after.
I suspect the reason you haven't noticed it is because of your chambered mufflers.
I replaced my Flowmaster 40s a couple of weeks ago. The new Magnaflow knock-offs have absolutely no drone.
Do you realize you were just passed by a NASCAR? I didn't think so.