No, i was talking about an open filter like a cone filter mate, an enclosed induction kit will always be better, but having an open ine will loose you a few bhp due to heat soak, but you won't notice it as it will sound faster due to the much louder induction noise
you won't any noticable gains from any filter - ie you won't bolt on an air filter, nail it down the road and actually notice an increase in performance, you will notice louder induction noise, which in turn gives a placebo effect thinking it is quicker