Ok guys, I am looking to get some more exhaust work done to the stang and not sure which route to take.... I am not sure if I should go with factory headers and offroad H-Pipe, or should I save and get the LT's and offroad H-Pipe. How much of a difference in gain will I have if I do go with the LT's compared to just the H-pipe. And how much horsepower will I gain overall with my Mac catback, offroad h-pipe, and LT's? Any input would be great.