Using the Perrin Wing Stabilizer on your 2011 - 2014 Subaru STI is simple. First, gather all the items from the box - you have one stabilizer, two pieces of 3M VHB Tape, and the instructions. Clean the area where you'll attach the stabilizer to ensure a good bond. Then, use the 3M VHB Tape to stick the stabilizer in place as per the instructions. It should take about 30 minutes. As for maintenance, keep it clean by washing it with mild soap and water. Avoid using harsh chemicals as they might damage the semi - gloss black finish. Also, check the mounting periodically to make sure it's still secure. If you notice any issues, refer to the warranty and instructions in the box.