hi all i have read a few posts on here about drilling the airbox (below the air filter lol) and was wondering if it makes any difference with a k and n in ppl say you here is more like an induction kit and that you dont get heat soak if its on the bottom of the filter
has any one done this and is it worth doing???? i am seriously thinking about it???
any advice or opinions is good i have a 1.9cdti 150 facelift estate.