From the factory, most vehicles come with halogen bulbs, which project in a yellowish light. By replacing your stock with LED fog light bulbs, you can create a modern appearance with the cool white light of LEDs. The installation is 100% plug-and-play, just replace your factory bulb! Fits 1998-2002 Trans Ams with factory fog lights. Includes two Diode Dynamics LED bulbs (3 year warranty) with install instructions.