I know Helix Motorsports has made that exact same intake design for a while now... Any testing / Dyno's? I'm really against sucking in hot air (personal preference)... and I'm inclined to think that the vast majority of the air would preferentially be drawn from the added filter as the resistance is probably much lower than the stock airbox route. So this may be considered slightly better than a DCI in the sense that you are getting at least a little bit of cool air.
'07 Space Gray 335i coupe w/ Sports Package | Comfort Access
COBB ProTuned| AMS | CP-e | BMS | Quaife
[Newark Photoshoot #1]