Does anyone know if the OEM performance exhaust from BMW is the same across both the N54 and N55 motors? i.e. will one removed from an N55 work with an N54?
I do they have different mid pipes! im not too sure about the back box thou.
N54 performance mid pipes have had the silencer removed, but the two kittys are still there. The N55 standard mid pipes are kittyless but it has the silencer!