Using your Flow Designs rear spats is easy. First, take out all the items from the kit - the pair of rear spats, the two stickers, and the fitting kit. Follow the instructions in the fitting kit to install the spats on the rear of your Subaru WRX or STI. Make sure to clean the area where you'll attach the spats before installation for a better fit. When it comes to stickers, you can place them wherever you like on your car to show off the Flow Designs brand. As for maintenance, wash your car regularly as you normally would. Avoid using harsh chemicals on the spats, as they might damage the hand - polished satin black finish. If there are any minor scratches, you can use a gentle car polish to make them less noticeable. With proper care, these spats will serve you well for many years, thanks to their 10 - year warranty and high - quality polyethylene composite construction.