hi guys recently I had a euro S50 motor in my M3 and now that I have taken it I want to retain the exhaust that I had while that motor was on. I got a question though, im not sure if mounting this exhaust to the S14 oem headers needs an X pipe of some sort or just a simple flange with two pipes going to the cat (ignore the O2 sensors in the picture, that will be taken out).
