I was a little worried about possible install problems with Pypes LTH on a auto, but WOW it went great!! My son did 99.9% of the work I was the tool handler and good company..My GT is an Auto and install went very smooth about six hours, we did not even have to remove motor mounts. Headers and xpipe fit perfect no rattles and no leaks! Back to the drag strip soon hope to beat my best et 12.78 delete plates next!!