Using these GrimmSpeed Fender Shrouds is a breeze. First, gather all the included hardware and the shrouds. They are a direct fit, so you can simply install them in place of the old factory shrouds in your 2015+ Subaru WRX/STI. Just follow the normal installation steps for parts like these. When it comes to maintenance, keep them clean. You can use a mild soap and water solution to gently wash off any dirt or grime. Avoid using abrasive cleaners as they might damage the powdercoat finish. Also, check the hardware regularly to make sure it's tight and secure. If you notice any signs of wear or damage, replace the parts as needed. With proper care, these shrouds will keep your engine bay looking great for a long time.