So i'm redoing my exhaust and wanna go slp with the whole thing. I was curious about the 300 S pipe. Does it make a sound difference or even hp increase? if not then i'll be making my own custom S pipe from 3 in. piping I have laying around. Also i was hoping to modify a fit of a loud mouth resonator but dont know which one to go with. Has anyone done this kind of exhaust? if so do you have sound clips or pictures?