Must be full 3" diameter, shorter then OEM (or at least no longer then OEM), with no flanges - both ends should be designed to accept standard 3" hose connection. An Audi plug would be nice, but I'd settle for any standard 5V sensor.
Also, within reason I don't care if it reads lean or rich, I can adjust that using my ARC1 MAF calibrator. Any suggestions?

It may be longer than stock though. It is 120mm long.

They are few and far in between nowdays.

and using the supercharger off a c32amg...and then lemmiwinking, and bigger injectors...just have to get the balls up to do it!