Using your HT Autos V3 front lip spoiler is a breeze. First, gather all the included installation hardware. Since the lip is pre - drilled, you just need to follow the instructions and use the provided tools to attach it to your 2015 - 2021 Subaru WRX or STI. It fits with the factory push clips, and there are extra clips in case you need them. When it comes to maintenance, simply wash it with mild soap and water regularly to keep it looking good. Avoid using harsh chemicals as they might damage the unpainted black finish. Also, be careful when driving over rough terrain to prevent any unnecessary impacts on the lip.