When I had the exhaust re-done on my K5 a few years ago, I had dual 2 1/2" pipes to a y-pipe and then 3" to a 50 series SUV flowmaster, and dumping right behind the rear axle. Well, the thing sounds AWESOME, if you're standing outside the K5. It also sounds real good at cruising speed. But it is way too 'deep' when idling while cold, or with a load on it. The interior of the K5 just makes the sound resonate. You can feel it in your head. I want a muffler, 3" in/out, that sounds good, but is not too loud. What's a good alternative muff that will still flow good? Folks have told me a Dynomax turbo sounds good, and is quiet, but I haven't heard firsthand. What do you all reccomend? I am not looking for completely quiet, I just want to get rid of that low frequency droning. Something throaty, yet quiet(er).