Hi guys, I've got a Vectra C 1.8 SRi non VVT- I've just purchased a 33-2848 K&N air filter panel off of eBay for about 34 quid, now I'm wondering about this mod some of you guys have been on about, where in the air box you can remove the funnel thing, supposedly removing the restriction on the air flow. Was half wondering if this creates a sort of turbulence inside the box which might impede the flow of air? Secondly, I was considering trying to get hold of the shorter VXR intake pipe but I'm not sure this is going to be of any advantage to a smaller cc vectra engine? Can anyone help?!!