also, on that es-sports.com website, theres 2 different oval mufflers. One says "s-series" then the other says "off set s-series". I noticed the tip of the exhuast (or whatever the real name is for it) is in the middle of the muffler on one, and on the side of the other, should i get the muffler that has the tip on side, because i plan to get a ctr rear lip for my car and it looks like the lip would get in the way if i have the muffler where the tip is in the middle