Bit of an update, Since the other air filter that the stage one kit come with was sucking in to much air and had duck tap on it to solve this problem, yesterday we fitted the standard air filter housing and a new filter that we bought from riv run. we had no wing nut srews that they need to hold the lid on, so we cut 2 lenghs of brass, drilled them out and tapped one side 1/4 bsw and the other 8mm, then fastened it done with them and 2 8mm bolts. We went out for a run in it a found it much better, it may a couple of holes drilling in it to add a tad more but will wait till we go for a longer drive.