Just came across this article. An interesting read, but it took them 10 years to complete the conversion . Guessing it wasn't much of a high priority to get it built, but they got there in the end I guess.
Short story version. Big engine, complete respray, other tweaks and it's a fast Zed
Full story. http://www.bimmer-mag.com/issues/132/articles/z4-maximus
Short story version. Big engine, complete respray, other tweaks and it's a fast Zed
Full story. http://www.bimmer-mag.com/issues/132/articles/z4-maximus