This is for 1 pair of Blue bulbs part number 1157!!This is a direct replacement, no modifications are necessary!These bulbs will work in any 1157 Applications like: Pair of bulbs are included for this price (2 bulbs)Turn signal bulbsParking LightsInterior LightsAnywhere you can put an 1157 dual filament bulb!!These bulbs carry a full 1 year, no questions asked warranty