What are the exact differences between 550 and 4.8 engines?

[abdoul]

I'd like to revisit this question.. with your permission!

I know that the x5 4.8 engine will bolt on.. but there are differences with the emission system..

Anyone knows for sure how to go around it?

I have a 2004 545i and a X5 4.8 engine from the X5.

What can I do to make it work? Any pictures of the setup on a 550? The VOB dealer could not help..

It's gotta be retrofittable!

Please take a look at these pictures sent by my mechanic... if you can make sense out of it.. I can't!

http://www.wanecorp.com/Gallery/view...=EmissionsDiff

Help..I do not want to give up on this project!