Original equipment manufacturer (OEM) all-clear adaptive bi-xenon housings, the most advanced lighting available for your A4, S4 or RS4. Plug and play for cars fitted with bi-xenon from the factory. For xenon fitted vehicles you will swap the electricals of your original headlight into these new units. For those without xenon from the factory additional parts are required for installation, inquire for details.*Note all North American RS4 models are equipped with AFS (Curve Lighting).