These headlights are designed to improve looks and visibility for your 1987 1988 1989 1990 1991 1992 1993 Ford Mustang. - These headlights are not compatible with factory Xenon H.I.D. systems, but will work with aftermarket HID Conversion Kits and comes with its own standard Halogen light bulbs for installation. - Made by OEM approved & ISO certified manufacturers. - These headlights are 100% D.O.T / S.A.E approved, and 100% street legal. - The headlights are with OEM standard quality and are designed for stock lights direct replacement.