Hello, first posting on Thumper Talk.. I know there already has been been talk about this but.. I have a 2007 WR450f that I would like it to produce more of a pouch. I have purchased a 2006 YZ450F complete head. I was wondering if I should use the whole head or just the exhaust cam. I will also been adding a white brother slip on exhaust that I purchased used. Any useful help would be appreciated.