So I got the American Thunder exhaust system from Flowmaster in last night. I have no patience so I decided to go ahead and install it as soon as I got off work. To my surprise it was extremely easy. No lift, I just put the back tires up on a set of the plastic ramps and crawled under the truck. All it took was a 3/8 drive rachet, 15 mm socket, 12mm socket, rubber mallet, and some wd 40. Took me and a buddy about 1 hr and 15 min from start to finish including 2 beer brakes. Sounds good. I can feel a little difference in throttle response. Not loud at all in the cab. Overall Im pleased with it.. We will see if it helped with fuel economy on my next road trip.