Your timing is great as I to have beeen giving this some thought.

I noticed that when driving the xf for pro long peiords that the performance becomes sluggish. I have felt this on most new cars and contribute it to eng bays that are virtually water tight and restrict air flow as a result. As the eng heats up so does the filter surround, casing, piping, ect and sluggest performance of all that hot air is the result.

Cured this on my 330ci bm with a cold air induction kit that insure the casing surrounding the K&N cone air filter was cooler than the eng compartment.

The above example is what I have in mind but, I was considering using 2 pipercross induction kits see www.needforspeed.co.uk these kits are housed in carbon fiber keeping the heat away.

Question are those hoses heat resistance.
how did you get them into the shape.
does the t junction hit the inside of your hood, where did you get that part.
As the viper pipercross requires a intake hose any suggestion as to achieve max air from outside. I was thinking bottom vent inbetween fog lights. I see you replaced yours with wire mesh. Did you buy or manufactor yourself. If bought were??
Sorry for all the question