Using this sway bar is easy. First, make sure your vehicle is a 2008 - 2021 Subaru WRX or STI. Then, install the sway bar according to the included instructions. You can adjust the end - link position on the sway bar to increase the sway bar rates. When doing so, be careful not to overtighten the parts. As for maintenance, regularly check the sway bar bushings for any signs of wear. If you notice any issues, replace them as soon as possible. Also, keep the sway bar clean to prevent rust. If you have any problems during the use, refer to the warranty details for assistance.