Using these Seibon carbon fiber side skirts is easy. Just follow the installation guide that comes with the product to attach them to your Subaru WRX or STI. When the shipment arrives, make sure to open the package and check for any damage right away. If you find anything wrong, tell us immediately so we can sort it out. As for maintenance, keep them clean by washing with mild soap and water regularly. Avoid using harsh chemicals that could damage the carbon fiber. And remember, since these are custom - made products, pre - ordering means you'll have to wait 8 - 12 weeks, but it's definitely worth it for a high - quality addition to your car.