[Zero Doom]

I still have the factory downpipe on mine. I had my exhaust done a little bit ago, from the cat back. xP I don't really see why they can't go back in and modify it down the road, if thats what you want, especially if it is a good shop.

I would suggest getting just the cat back, with a test pipe. xP It is pretty cheap, mine was 250, but it was at the best place in the state, so it was worth it.