I have seen alot of filter systems & compared them all. I have the volant because I got it cheap, but if I hold my filter up against a afe filter... ... ... the afe is about twice as big as the volant. I would get the afe stage 2 filter, but do research on bhaf... . seems to be the new thing. if planning on alot of upgrades, then make sure you get atleast 1000cfm filter. Thats what I've been told.