Using this wide body kit is easy. First, make sure your car is clean and in a well - lit area. Start by fitting the front bumper carefully, aligning it with the existing parts of your Subaru WRX. Then attach the front wings, followed by the side skirts and finally the rear arch kit. When handling the parts, be gentle to avoid any scratches. As for maintenance, wash the kit regularly with a mild car wash soap. Avoid using harsh chemicals as they may damage the white gel - coat finish. If you notice any chips or scratches, touch them up as soon as possible to prevent further damage.