Get a pair of those roll up foam ear plugs. Put them in when you drive around. For a couple of bucks you can find out if its worth spending bucks on redoing your exhaust. I am 64, and have lost some hearing in certain frequency ranges, in addition I find some background noises hyper annoying. We have a grocery store in the area that has quarry tile floors, the sound of the grocery carts passing over that floor while not loud, just totally irritating, can't stand it for more than 10 minutes. So in some cases it's not the volume but the type and frequency of the noise that your brain finds bothersome. As for exhaust, I have turbo flows on mine, and I like how they speak when working, and quiet down at cruise.