That filter IS way smaller than the Pro-Flow or Alba K&N and there is no way it flows as much air. I like the rest of it but put a bigger filter on it, see if a 250R K&N will fit I think those are very large. Or just buy the one that comes with the Alba kit should be about the same price but better performance.
That filter in the pic looks like the Mickey Mouse little filter on my Z400 that came with the Pro-Flow.