Using the APR Carbon Fiber Front Lip Airdam is straightforward. First, make sure your Subaru WRX or STI is from 2018 - 2021. Then, simply integrate it with the factory front bumper as it's designed to fit. When driving, you'll notice better stability and grip right away. As for maintenance, keep it clean. Wash it regularly with a mild car wash soap and a soft cloth. Avoid using harsh chemicals that could damage the carbon fiber. If you're in an area with a lot of road debris, be extra careful as the airdam is at the front of the car and can be more exposed to impacts.