Using these GrimmSpeed fender shrouds is a breeze. First, make sure your car is parked on a flat surface and the engine is cool. You can then simply attach the shrouds as they are a direct fit, which means they're designed to go right where they need to be on your 2008 - 2014 Subaru WRX or STI. As for maintenance, just use a mild soap and water solution to clean the shrouds occasionally. Avoid using harsh chemicals or abrasive materials as they can damage the powdercoat finish. Also, check the installation regularly to ensure the shrouds are still firmly in place. If you notice any loose parts, just tighten them up. That's all you need to do to keep your fender shrouds looking great and functioning well.