I have the exhaust from TopSpeed along with the cat delete pipes. Make sure you also use the easy clamps intstead of the clamps that are supplied. Using the easy clamps eliminated my drone. I have had it 2 and 1/2 years and I honestly do not have any drone and I still grin when I get the burble
When I first put the exhaust on, I did not like it at all. But others encouraged me to keep it on and let it break in. I did that and I am happy that I did. For the price, it can't be beat IMO.