Ok I already have a 3inch cat back system installed and I'm planning on keeping the 14b for now. Next thing I want to do is replace the stock exhaust section from the turbo to and including the cat. I've been reading up on downpipes; o2 housings; o2 eliminators; external dumps; internal dumps; etc. If I'm going for max power and dont care about how loud the car will be a WOT what type of section should I be investing in? I'm thinking sometype of 3inch downpipe with a 3 inch section to replace the cat as well. So that leaves me with the o2 housing right? I'm not worried about emitions tests I have that taken care of 
