cold air intake

Just curious, anybody fitted an induction/cold air intake kit onto their Leon with a 1.5 TSI EVO engine tuned to 150 factory? Just curious as to whether it will throw up any warning lights or codes, and is it easy enough to do yourself as a layman?

Hi guys, im wondering if I could rack some brains, I installed a cold air intake a year ago, MST PERFORMENCE, a lovely sounding one, and about 5 weeks ago or so, the noise on it has completely dulled, there's no whoosh or little stutter like it used to do, and im trying to work out why. Ive...