Using this single gauge pod is a breeze. First, make sure your car is a 2015 - 2021 Subaru WRX or STI and it's a left - hand drive model. Then, simply mount the pod to the driver - side vent. You can install a 52mm or 2 1/16' gauge in it. You have the option to run the wiring either inside or outside the pod. When installing, no cutting or drilling of your car is needed, so you won't damage your vehicle. Remember, the gauges themselves are not included, so you'll need to get those separately. For maintenance, just use a soft cloth to wipe the pod clean. Keep it away from extreme heat sources as even though it's heat - resistant, excessive heat could still potentially cause damage.