Using this HT Autos bottom line kit is a great way to upgrade your 2011 - 2014 Subaru WRX or STI Hatchback. First, make sure you have all the parts in the box: one front splitter or lip spoiler, two side skirt extensions, and two rear lips or spats. Since professional installation is highly recommended, it's best to take it to an expert. They'll know how to fit it properly and make any necessary modifications. As for maintenance, the tough polyurethane construction is pretty durable. Just clean it regularly with a mild car cleaner to keep it looking good. Avoid hitting it against hard objects to prevent dents and dings. And remember, because it has an unpainted black finish, you don't have to worry about paint chipping.