<< Only a green panel filter mate, but from what i've read unless your gonna move to a full "smooth" induction kit, any expense in this department may be wasted, a standard Subaru paper filter may well be fine. The whole "air in - air out" thing is about reducing turbulance and improving flow but turbulance comes first, why do people spend so much money getting cylinder heads ported? To reduce turbulance.
Right now my engine way out performs the handling of my car, both brakes and suspension are in need of a comparable upgrade.
I wish I hadn't spent so much on a Hayward & Scott system as I could have had a better fitting stainless system made for me in Glasgow, for much less. I have bought both the H&S classic backbox and the jap style back box not to mention center, down and up pipes. Both backboxes sit so low they look bloody awfull. I have the classic style fitted and it sits about 5" too low, it looks like it's going to fall off! And before anyone asks, yes it is properly fitted. I'm getting it modified by someone at the end of the month I'll post before and after pics and contact details if they do a good job.
Robbo. >>
You could always try Meercat in Kilburnie.He done mines and its perfect.