To install the Noble V1 Rear Roof Visor on your Subaru WRX, first test fit the part to understand how it goes on. It's easier with two people. The best temperature for installation is between 75 - 95 degrees with relatively low humidity. Clean the installation area thoroughly to remove dirt and debris. Pull up a corner of the adhesive backing strip so you can remove it when placing the visor on the vehicle. Align the visor on the glass and pull out the backing strip completely. Then press the visor firmly. A strong bond will start to form over 24 hours and reach full strength in 72 hours. For maintenance, simply clean it regularly with a mild car cleaner. Avoid using abrasive materials that could scratch the visor. Keep it out of extreme weather when possible to ensure long - lasting performance.