Abstract: A device for diverting exhaust gases from the engine of a vehicle such as an automobile to opposite tread surfaces of the driving wheel tires thereof. The device includes a valve assembly having a body interconnected to the vehicle exhaust system, conduits for diverting the above-indicated gas flow being joined to the body and extending outwardly therefrom. A valve member in the form of a pivoted plate is located within the body and is manually operated to divert the exhaust gases into the conduits for discharge at the driving wheels of the vehicle. The device is useful in removing ice or snow from the driving wheels as well as preventing hydroplaning thereof in wet weather.