Turn signal. PY21W single-intensity LED bulb. Looks like 1156 bulb but pins of PY21W are at 4.30 and 9 oclock positions pins of 1156 bulbs are at 3 and 9 oclock. High intensity LED bulbs from Kuryakyn. More light less current draw and better vibration resistance for a much longer life span than regular incandescent bulbs. PY21W Single-Circuit applications