Hi mate , i fitted a K&n pannel filter a while back , works fine , no problems with the MAF , wot im told is you need to watch when you re-oil it , lets face it K&n are a huge company whey wouldnt be aloud to build some thing that could damage your engine ! gives you a slightly "raspy" noise , am told it will give a few(2or3bhp) just cause the engine breaths easier and if turbo model it helps power build quicker!