Living in NJ, and driving annually out west for wheeling, keeping the OEM (or close to it) quietness is important to me. My first JKU had an AFE on it, and it looked good, and sounded good, but got real annoying real fast on the highway at certain RPM, and certain speeds. However, I really really hate the butt of a wrangler with that huge muffler. On my current JKUR, I plaited it black, so it was less noticeable, but I'd love to have a pre axle dump on my diesel, and like I said, with the turbo motors, hopefully there is some nice HP and TQ to be gained....especially with a straight pipe.