Using this exhaust tip kit is easy. First, make sure your Subaru WRX or STI is from 2011 - 2021. Then, remove the old exhaust tips if there are any. Take the new tips from the kit and attach them to your exhaust using the provided clamps. The 2.5' slip - joint inlet is designed to fit well. When it comes to maintenance, keep the tips clean by washing them regularly with mild soap and water. Avoid using abrasive cleaners as they may damage the brushed'matte' finish. If you notice any loose parts, check the clamps and tighten them if necessary. Also, be careful when driving on rough roads to prevent any impacts on the exhaust tips.