ive got one too, running the K&N style filter that came with it, and after 8 months use so far, its not given the maf any issues, 4 months ago the car was remapped, and still ive got no issues.
that said, id idnt realise you could get dry filters so cheaply!
what size mouth do i need? is the pipe 3''? if theyre that cheap, i may get one and fit it when i whip the bumper off for my FMIC next weekend.