Using the Perrin Radiator Shroud is easy. First, make sure your vehicle is a 2008 - 2014 Subaru WRX or STI and has an OEM radiator. Follow the included installation directions to bolt it on over the core support and radiator. As your car moves, the shroud will help push more air through the radiator, keeping your engine cool. Remember, this part is only for OEM radiators. If you have a non - OEM radiator, don't install it as returns won't be accepted. To maintain it, just keep it clean. You can wash it gently with mild soap and water to keep its hyper pink powder - coat finish looking great.