um… wow… comp. eff. is based on the shape of the compressor impeller and rotation speed of the compressor impeller… any gains in flow eff. would be measured in .001 bar range… and the first bend in the CAI to the compressor inlet negates any gain potential by a factor of 10… you have better gains in flow by using more advance compressor housings then any other ‘cold air’ side add on.
and there are many companies out there with ‘horn’ entrance profiles, HKS, Apexi, Blitz, tonnes of ebay knock offs even.