I'm working on this particular problem at the moment...
OK.. I'm not running an injected engine however given I have single rail carbouration (Twin 45's) things won't be that far off.
There is a detailed thread at the following link which may be of use....
http://www.pistonheads.com/gassing/topic...20to%20Airbox??Personally I'm looking for a positively charged cool air induction system.
Having got the engine re-built and into the 4/4 we spent Sat looking at the alignment of the cyl head in comparison to the inner wing edge and the bonnet.
Suffice to say we think we have worked out how to install a direct +ve charge N/A closed air intake system... as far as I know this would be first of type.... and takes queues from the Aero induction system... all be it in concept.
As far as ITG goes,,, I've also seen them come out top in flow tests when they have been objectively tested I would recommend them if you can fit them in.
It is worth doing a lot of research though as there is a lot about flow, +ve and -ve pressure characteristics that need to be thought of before making changes...