Abstract: An exothermic injector adapter that allows a light weight gasoline engine to operate with the efficiency of a diesel engine. The adapter includes a body, a ceramic sleeve, a retainer, ground wires, power supply wires and a catalytic deflector. The adapter is used with any type of diesel fuel injector to replace the spark plug. It utilizes a heated catalytic deflector in close proximity to the outlet of a fuel injector to ignite the fuel charge efficiently. The catalyst used is exothermic or heat producing under certain conditions and has the ability to fracture the heavy and complex hydrocarbon molecules found in most automotive and diesel fuels. The catalyst is plated to the deflector in a porous configuration so that it has colloidal sized crystals. The catalytic deflector is electrically preheated to its level of exothermic activity.