You e34 guys -- Any idea as to what Carbon Dynamic Airbox model fits the
e34 540i? I've been looking on the internet, and this forum for about 30 minutes with no luck.

It can be done. http://www.qsz.com.au/images/BMW%20E34%20540i%20LE.JPG

the only help i can offer you is to say that that bmc cda box was fited to an aussie 540 6sd.
if you email simon from qsz he will tell you what model box he's selling and i think you'l find hes retailing them for about 600aud

Thank you. I'll follow up with him!