I ordered the Megan Header yesterday and now I have a couple questions. I have DX so the cat is not under the car it's on the front almost acting as a downpipe also. The headers go all the way down and then bend back towards the rear of the car so my questions is this. Will I still be able to use that cat and just put it under the car or will I need to get a different one? Also what are the differences between a DX and an EX exhaust. What should I get since the header will change part ofo the exhaust system if I do move the cat down?