Using this exhaust tip kit is easy. First, make sure your Subaru WRX or STI is turned off and cooled down. Then, remove the old exhaust tips from your COBB Titanium Cat - Back Exhaust or your custom exhaust. Next, slide the new tips onto the exhaust pipe using the 2.5' slip - joint inlet and secure them with the included clamps. As for maintenance, regularly clean the tips with a mild automotive cleaner to keep the brushed'matte' finish looking great. Avoid using abrasive materials that could scratch the surface. When driving, be careful not to hit the tips against curbs or other objects. This will help ensure your exhaust tips last a long time and keep your car looking sharp.