Using this front lip is easy. First, gather all the installation hardware that comes with the product. Then, line up the pre - drilled holes on the lip with the corresponding spots on your Subaru WRX or STI (2015 - 2021). Use the included hardware to bolt it on securely. When driving, be aware that the front lip is close to the ground, so avoid driving over large bumps or high curbs to prevent damage. For maintenance, clean it regularly with a mild car cleaner and a soft cloth. This will keep the glossy carbon fiber finish looking great and prevent dirt build - up.