Using these fender flares is easy. First, make sure your car is clean where the flares will be installed. These flares use OEM mounting points, so just follow the existing holes on your WRX. You can install them with basic tools. For the rear fenders, if you want to use the factory reflector, just place it in the opening as it is. If you want to upgrade to the plug - and - play fender lights, follow the instructions that come with them. When it comes to maintenance, just wash the flares with mild soap and water regularly, just like you would wash the rest of your car. Avoid using abrasive cleaners as they may damage the paint. Keep an eye on the mounting points over time and make sure they are tight. If you notice any issues, contact the support team as the flares come with a lifetime warranty.