Modified D21 Fog Lights will keep you at the head of the class. Cut through the night with new Fog Lights. Make heads turn with upgraded D21 Fog Lights. Fog Lights add another pair of "eyes" to your vehicle. Do more with D21 Fog Lights. New Fog Lights will aid in your safety and the safety of others as it will be easier to see you. New Fog Lights are an essential modification and should be done.