This is a USED Roush Supercharger system for 2005-2009 Mustang GT with the 3v 4.6L engine. The supercharger has less than 3000 miles and was removed so it could be replaced with a larger supercharger. The supercharger kit includes all hardware except spark plugs, fuel rails and no tuning software. It will increase your Mustang's horsepower from 300 to 435 at the crankshaft and adds 80 ft/lbs of torque. The supercharger and all components were removed by professionals and is in perfect working order. $3100 obo will ship anywhere in the continental US. Pictures are available.