Ok, I searched. I just went up to the exhaust shop to get the cat and muffler cut off and a straight 4" pipe run in its place. He told me that a straight pipe wouldnt fit and that it needs a S-bend in it to fit cause the muffler is offset and he couldnt work with 4" pipe as his tools arent big enough. That I understand but It looks to me like the pipe from the cat to the muffler is at an upward angle so they should pretty much equal out and a straight pipe will work. Am I seeing things?