Using this FactionFab brake rotor is easy. Just install it in the rear position of your Subaru WRX (2006 - 2007) or Legacy GT (2005 - 2009) as per your vehicle's standard brake rotor installation process. Since it's bi - directional, you don't have to worry about which side it goes on. For regular use, you'll notice improved braking right away, whether you're on a normal drive or taking a more spirited ride. When it comes to maintenance, keep an eye on the rotor's condition. Check for any signs of excessive wear or damage regularly. Because it has a black e - coating for corrosion resistance, it can handle some tough conditions. But if you live in an area with a lot of salt on the roads during winter, it's a good idea to wash your wheels and rotors occasionally to keep them clean. Also, make sure to use compatible brake pads to get the best performance from your new rotor.