I think it looks good and would probably increase flow, however I can smell a debate on the necessity coming. My gut tells me this will help the dedicated circuit racers that see sustained loads for more than a few bursts.
If nothing more it gets rid of the stock ugliness which for some builds is dang near mandatory.
It just dawned on me this may be necessary for part of this kit due to radiator / other size/space restraints . So if that is the case then it will obviously be useful