Could possibly use this part for your own cold air intake set up on stock 320 crossfires. Here's a picture.

 

how does the height compare to the stock intake, did you install it on your xf?

 

No I just stumbled across this part on the net, so I never tried it. It bolts up to your throttle body, but from there you will most likely have to bend your own pipe to fit around the engine.

It's really the intake adapter for the SLK32 supercharger, so I'm not sure what the size of the two ports are, they might be too small for N/A induction. I don't know someone will have to check it out...