Using this StopTech slotted brake rotor is straightforward. First, make sure your car is the 2002 - 2005 Subaru WRX. Then, replace your old rear - right brake rotor with this new one. For the best results, follow the standard installation steps in your car's service manual. When using the brakes, you'll notice improved stopping power right away. As for maintenance, keep an eye on the rotor's surface regularly. If you see signs of excessive wear or damage, it's time to check it more closely. Avoid harsh driving that can put too much stress on the brakes. In wet conditions, the slotted design helps with water dispersion, but still drive carefully. If you're using the car for track events, give the brakes a cool - down period after each session to prevent overheating.