I got home today after 45 minutes of driving, jumped out of the car and popped up the bonet. I went to touch the K&N apollo and to my surprise it wasnt even luke warm it was cold. The rubber hosing going back into the throttle body was warm, but there is definetly cold air flowing through there and it pulls harder than ever. Its the perfect match with the CES exhaust. My advice to anyone out there considering a CAI, give this thing a go, saves you a bit of cash, take it from me ive tried alot of different inductions and this is my pick of the lot.