I recently fitted an induction kit to my pug 180, after hours pulling my car to pieces, to cut a long story short I was left with a hose that's connected to a small fan. The other end went back to cylinder head. Anyway after hours of Googling induction kits. I came across 1 diagram showing an induction kit similar to my set up and it shows the hose connected to the bottom of the induction kit near to the foam filter. What does it do exactly and is this going to pump hot air in to my cold air ducting. ? Or do I just ignore it and cap it off.