Hi Ash, ive come to the conclusion of fitting a panel filter first and if im not satisfied i'll go for the K&N Typhoon induction kit as includes a heat shield. Everyone likes a bit of sound (theyre lying if they say they dont) and the afterburner vortex ive got provides that. Think i'll be upgrading to a turbo next year but for now i'll just make the most of the GX sport ive got. I also need to upgrade the stereo and speakers as the car was standard when I bought it. Any advice for sounds welcome as im unsure of speaker sizes. Im still undecided on a new head unit too, double din upgrade? Oh and im 100% certain its the cold affecting the car now. Started a bit lumpy this morning when it was 1°c but was better later on when 5°c.