Thanks for the posts guys. That is my exhaust, i got a really good price on it so i bought it. I really want the nur spec, but i guess this will work. So i guess all i need is a dp and and test pipe since the previous owner welded the cat in place, so im gonna get rid of the whole thing. But as far as sizes, what will i need, i will in the near future have my td06 on with the bigger greddy elbow, right now though i just want to get a dp and test pipe to the stock elbow. Do i have to worry about sizes since i will soon have a bigger elbow?