Diode Dynamics DD3012 Pure White Lighting Control ModuleCustom Appearance. This kit will convert the LED tail light on your 2015 2019 Subaru WRX STi to also function as the turn signal. This kit will instantly customize your vehicle for a much more modern appearance on the road! Additional Backup Lights. Also available with the kit, you can convert the old turn signal socket to an extra backup light. With double the number of backup lights, you will add much more visibility when reversing at night. Each