...Because I want Both Headlights to 'Match' perfectly! The only way is to replace them as a Pair. Otherwise; One being New, One being Old, the intensity of each is bound to be different. Also the Old one will be on its' 'way out'. Have you considered the 7" round (True-Replacement Bulb)'Halogen' Crystal. Sure to be much Brighter than the 30 year old originals...