Let me just say that I have the AWE Touring Exhaust on my SQ5 (standard setup - do not have the Non-Resonated Downpipes) and it's excellent. I have a separate post about it somewhere in this forum. Anyway, for day to day driving it really isn't much louder than stock. In "D" and Comfort mode, you would hardly know the difference. of course, the higher the RPMs the more growl you are going to get. So in "S" and Dynamic mode, your up and downshifts come much later and you get a far louder, more aggressive tone. But for me at least, there is zero drone and when you are cruising, even in S/Dynamic, the sound is not overbearing. The ONLY time I find it a bit loud is on cold start, the 1st 15-20 seconds of idle you get a little bit of a hum in your ear. Aside from that, the system is terrific and for me it really upped the driving enjoyment factor. I'm in the Montreal area, had it made to order, waited about 6 weeks from order to install (I also ordered at the busiest possible time of the year so that may the extreme). Well worth the wait though, highly recommend it.
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