Using these GrimmSpeed fender shrouds is a breeze. First, make sure your car is parked on a flat surface and the engine is cool. Then, simply install the shrouds according to the written installation guide for 2008 - 2014 Subaru WRX/STI. It's a direct - fit product, so you won't need to make any major modifications. When it comes to maintenance, you can clean the shrouds with a mild soap and water solution. Avoid using abrasive cleaners as they can damage the powdercoat finish. If you notice any scratches or chips, it's a good idea to touch them up as soon as possible to prevent rust. Also, during extreme weather conditions, it's not a bad idea to give the shrouds an extra inspection to make sure they're still in good shape.