Does any one know of a company that make supercharger for the 2003 4.6l f150?

 

Go to www.procharger.com

 

Mike Troyer sells the Allen roots-style system. I think he has a pretty fair price for a whole package deal with fuel system upgrades and custom tuning. I believe the Allen system uses the Eaton M-90, which I think is pretty limited as to pully swaps for more boost though (but I may be mistaken). Good luck, let us know how it goes!