30% might be a bit OA, but Simotas can lead to pretty dirty engines. Not a big issue if you follow a frequent oil change program, but it gets irritating losing power after awhile, as Simotas often lose flow over time... much quicker, in my experience, than other aftermarket filters.

I'm pretty happy with K&N... flow doesn't degrade as badly as my old Simotas did (I had them on my Sentra before)... and it's very free-flowing. I guess the only way I could get better air-flow is by using the steel-mesh filter, but that doesn't keep anything out. Looks damn cool, though... (still have one at home... )