well, I put the tail pipe on after much grunting to get it free from the muffler, and it quitened it down a bit from it just exiting under the truck. It is loud if you romp on it of course! hehe, but, its not bad if your outside and you happen to be cruising by. Cant wait to get my gauges today! Thats next. Then I will be done for a while, well, once I do a do-it-urself mapfooler, and then remove the wastegate line to see if it makes more boost. Maybe the 10K mod....