I was researching some more yesterday when i was trying to find some civic si motor mounts, and really couldnt find a answer. The civics cat is right off the header, with my b18b where am im going to be able to fit the cat in there? I have a 5zigen exhaust on there now but stock header on the civic and mounting up the stock b18b header after I do my swap. I dont want to go anything aftermarket really becasue in a matter of months it will be turbo anyway. So will i need to mount up the integra manifold, then chop my civic exhaust, get a pipe made to start the bend under the car, connect a cat there and get 2 o2 bungs welded in, then another pipe made to bolt up to the rest of my 5zigen or what?