921 LED Bulbs

921 bulbs are most often used as backup bulbs, but can also be used in tail and side marker lamps on some cars. They are the same base as a 194 bulb, but the bulb segment is larger and has higher wattage. The 2008-2014 WRX sedan and 2011-2014 STI sedan use these for backup bulbs. The bulb length (above the base) on these is about 1 3/8". Make sure there is enough room in your bulb housing. This bulb design packs a lot of LED in a small space. It should be used for short periods of time, and not be left constantly on. (It will overheat and start to flicker.) One-year replacement warranty. Set of two super-white bulbs.