This is for 1 pair of Red bulbs part number 89!!This is a direct replacement, no modifications are necessary!These bulbs will work in any 89 Applications like: Backup bulbs (2 bulbs are included, 1 pair)Turn Signal LightsParking LightsInterior LightsAnywhere you can put an 89 bulb!!The bulb is an 89, which is a metal base bulb, it is a single prong, single filament bulb similar to an 1156 but with a shorter smaller glass baseThese bulbs carry a full 1 year, no questions asked warranty