Using this StopTech brake kit is straightforward. First, make sure your car is a 2003 - 2005 Subaru WRX and double - check the pad fitment based on the build date as described. To install, remove the old brake components and replace them with the parts from this kit. When driving, you'll notice improved braking right away. As for maintenance, keep an eye on the brake pads for wear. You may need to clean the rotors occasionally to reduce dust build - up. Since the brake lines are braided, they're more durable, but still check them for any signs of damage. Remember, this kit is designed for performance street driving and light - duty track use, so don't push it too hard in extreme racing conditions.