Using these fender emblems is a breeze. First, clean the area on your Subaru STI where you want to place the emblems. Make sure it's dry and free of dust. Then, simply peel off the backing of the 3M adhesive on the emblems and stick them in the desired spot. Press firmly to ensure a good bond. When it comes to maintenance, just wash them with mild soap and water, and dry them gently. Avoid using harsh chemicals as they might damage the emblems. If you're installing in cold weather, it's a good idea to warm up the emblems and the surface a bit to make the adhesive more flexible and sticky.