all i know is i LOVE my Dinan Midpipe not only did it add a kick ass amount of power it made my car the best sounding car i ever had and one of the best i have ever heard and on top of that not one bit of drone. amazing work!!
not saying others don't make power, but when you are taking advil for your headache from the droning you will be sorry you didn't get it thats all i can say lol
just listen no drone at all