Got some fogged-over headlights in my Second Gen Dodge Ram, Dodge Ram Sport (mine) has 2 headlight bulbs and one corner light per side. Total 3 bulbs per light. Base model (non Sport) lights were single bulbs and corner lights. With 2 lights per side. Dual bulb headlights were an option. It's a 2-into-1 merge adapter to convert it from 2 bulbs to 1 bulb. I purchased that so the new light housings will work on my truck.