Some people will rant and rave saying its bad etc and some people will say its fine! I don't drive my car on shitty dusty roads and it cant suck objects like flys/leaves in etc because it still has the gauze over it, it sounds mental
As long as its not a oil type filter than pretty much any paper type is good.
oil filters tend to leave oily residue on the turbo fins, which i dont like, so went to a paper type filter.
HKS mushroom = fail of filter, only buy it for the name sake and the induction noise haha