Along with Omaha's question, this is the other aspect of supporting the differential and preventing wheel hop (if you have it). This is sold on another forum but here is the teaser picture. I will have to cut a notch into side of finned cover for this to fit BUT IT'S A DIRECT BOLT ON THE STANDARD COVER. You need to ask for the one to fit the large 215 diff.
I'm just amassing up parts for the eventual M3 conversion of my suspension. Likely this summer though. This kit is sold by VWetish over on n54tech.com.
http://www.n54tech.com/forums/showth...=38313&page=10