I have installed quite a few exhaust systems and the jba system does seem to fit together quite well. At first start up the exhaust has a nice mellow tone to it and mellows out to just slightly louder than stock. When cruising down the road it's a nice deep mellow tone and not over bearing to your ears. My all terrain tires are actually louder. When ya do get on the throttle the exhaust does let you know its there especially in the upper rpm range but not so loud as to kill your ears.
Pretty nice system.
Took about 2-1/2 hours to install. Fitment is good. Had to bend the rear hanger to prevent it from rattling, but all said and done smooth install. Woke the 4.o up on mid range. A little louder then anticipated but tolerable. Has a nice low growl. Added a set of JBA headers which opened it up a little more and seems to have a lot more power.