Using these ABW fender flares is easy. First, you'll need to prep the areas on your Subaru WRX or STI where the flares will be bonded. This might involve cleaning and sanding the surface for a better bond. Once prepped, carefully place the flares in position and bond them as recommended. The front flares are one piece, so they'll go on as a single unit. The rear flares, being two - piece, need to be fitted around the door opening. After bonding, you'll need to do a final fit check to make sure everything is in place. Then it's time to paint them to match your car's color. Remember, these flares are made to order, so it will take 2 weeks after you place your order to receive them. For maintenance, keep them clean with a mild car wash soap. Avoid using abrasive cleaners as they can damage the fiberglass and the white gelcoat finish. If you notice any chips or scratches, touch them up with paint as soon as possible to prevent further damage.