I finally got to pull something after install of new 4" MBRP turbo back exhaust. I was very impressed with results, power when not towing seemed improved and acceleration was a lot better,turbo spooled up higher. I got to tow my boat about 170 miles using a lot of different road conditions, from mountain to valley freeways. My boat only weighs 3600 lbs and truck doesn't feel it back there. I checked mileage on freeway and at 62 mph I went from 16 to 18 mpg and egt seemed to run like temps when not pulling anything, before exhaust mod. It's very cool to out pull a car trying to cut me off in a merge lane, and me pulling a boat.