LST Direct Injection Plug KitLooking to convert your GM Gen V LT engine to a traditional port style fuel injection? The Factory Mast Direct Injection Plug kit offers a non permanent non weld solution to replace your direct injection system, and convert to traditional Port Fuel Injection. Why convert to port fuel injection? Port Fuel injection offers a wider range of engine control systems, and intake manifold options. The GM Gen V engine offers comprehensive late model