Ok so a couple days ago i got a wicked flow muffler put on my 3.7L v6. it is a single inltet to a dual outlet. it is pretty much open pipe. about a 3in piping. i didnt put any other pipning on yet bc i like the way it sounds. i was wondering about if i should buy the k&n air intake or that jeep liberty thing. is there any other things to do to put a little more push in my truck?