My friend has a 94 318is and he wanted me to help him find a part he needs. Had no luck searching online. Figured id ask the forums.
It's in the picture circled in red. All i know is it has coolant hooked to it because it has a leak. You can see where the previous owner had JB-wleded it. http://img32.imageshack.us/img32/346/leakypipe.jpg
If you have a part number or the name for it that would be great. And maybe a place to get it from would be even better. I tried Bavarian Autosport but didn't see anything like it on the website.