has any one on here fitted a k+n 57I kit to there mk4?? ive suposedly won one from golf mag for 'letter of the month' and was just wondering if any one has fitted one and if any gains etc??,will to a step by step picture guide when i get/fit as gonna service the old girl aswell!!!, and ive just been looking under neath at the exhuast and im sure the scorpion dtm that ive took of me mk2 will fit!! hmmmmm i wonder