The PPK bmw p/n 11122157665 is indeed for a N54 car.
http://www.realoem.com/bmw/showparts...11&fg=95&hl=95
I am not sure what all would be different on a N55 other than the spark plugs and maybe the coolant pipes. ?
I would contact Tischer or United and ask them. I am sure they have run into this before. It sounds like you got a great deal on the MPPK package, so even IF you have to buy a few coolant hoses/pipes, I think you got a deal.
