Hey all, thought I would try out an open air induction kit on my 2.2 direct. Very simple to fit, rubber fitting onto MAF then filter onto rubber fitting (simples lol). Secured it with a mounting bracket and took car for a spin........

This is where the problem is, there is a constant hissing sound when gentle acceleration, if you give it some welly it sounds like a tank, really really loud roar, nice but loud lol........I dont personally think it sounds right, almost like there wasnt a filter fitted sucking in to much air. Didnt really notice and difference in power but it seemed smoother, no flatspots. No EML etc.
So for now ive but the airbox back in, but is this normal?

The filter is only a £40-50 wolfrace with the vectra rubber adaptor.