I wanna order two of the MAC flowpath mufflers tomorrow but I dont know what offset I should get. I'm guessing it has to do with where the pipes will connect to both ends of the muffler. I have a 2000 GT, I just want the stock offset. They offer 3 different offsets: 2 1/2 " offset in/offset out, 2 1/2" center in/offset out, and 2 1/2" center in/center out. Which one should I get?