The Flowmaster Outlaw muffler had a great tone when at idle but once you start down the road the sound just drones inside the Jeep and is uncomfortable. The P.O. installed that and a K & N cold air intake to try to squeeze more power out of the 3.6 after putting 35 inch tires on it. In a couple weeks I'm putting 4.56 gears in to get me back in the stock power range so the Flowmaster and K&N will no longer get be needed. I'll be looking for a stock air filter set too.