The latest generation 1900 TVS (Twin Vortices Series) supercharger is an available upgrade on any of the Tork Tech Intercooled kits for the '99-04 Mustang GT. This upgrade will allow power levels in excess of 700 HP! This "upgrade kit" assumes you have already purchased a Tork Tech kit with the Magnuson MP112 supercharger and you want to upgrade to the TVS style supercharger. This kit provides the new supercharger with aluminum finish and everything necessary to mount the unit to your existing Tork Tech lower manifold. New drive pulleys are not included. Call us to discuss the performance level you are looking for and we can provide the proper supercharger nose pulley and lower crank pulley to achieve the boost level necessary. This supercharger is capable of boost pressures up to 20 psi.