Just installed my new dual resonated AP mid pipe today and aside from the amazing fit and easy install it sounds excellent, nice and deep and hardly any droning.. maybe a hint at about 3900 but thats about it. Havent heard it outside the car yet but my friend told me it sounded beastly.. i am running it with the stock exhaust right now because i had to get rid of the cat due to it starting to clog. My RPMS at idle are much more stable now and my car seems to be running much more smoother. Two thumbs up for Agency Power!!!