I wouldn't get the $250 kit, I think those are just for the titration kit and BD formula. If you go to FreedomfuelAmerica.com they sell a kit for around $2300 and a dual processing system for $3299-3999 or something. I want to make my own but I need to get the truck first. And it ends up being .70 cents a gallon with free oil-lye-racing methenol.