the HKS powerflow would be my first choice, i think it came out best of all in fto induction tests done by the lads in england, + 8.5bhp,
the ITG came in at +8bhp, im not too sure if this figure was reached with aid of a cold air box?? can anyone clarify this ??
the HKS has a green mushroom shaped filter, with an outer frame, its over twice the price, i think ??
it gives a deeper, not so raw note, ive not heard it fitted to an fto, but on evo 5 and 6, and subaru wrx is sounds sweet.
im getting one for my gpx after xmas, also designing a coldbox for it
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i think its a toss up between the ITG & HKS for most people, personally its HKS for me