you will need a special adapter to mount the parts.
http://www.corsa-gsi-tuning.de/html/hau ... u_16v.html
you can take a look here (the section is called "16V Bremskraftverstärker" in the middle of the page)
sry but my english is not that good, so that i can translate the text in 5minutes and i'm at work, but when you still need help for understanding, just write a pm