I hear what your saying Mitch and believe you but two questions?!
what size cold air feed did you use? the normal 80mm size or the fat 104mm size that i use?!
plus did you use Feel's battery relocation brackets like me too?!
I did before and after logs of my modded air box to the OEM set up and got a good increase in flow (4% from memory!) so for £80 all in that wasn't bad at all (filter, feed and battery relocation brackets)
I see 210g/s
at most but normally low 200s i think when the weather is HOT!
as we both know ko4 cant flow more than 210 g/s (realistically!) so for the money modded air box is the way to go
for me! if money is no limit you may aswell get the £200 (or watever it is) BCM CDA (originally that was my first choice!) as it looks cool and sounds slightly better/throatier than a modded airbox.
thats my 2p worth!