Using this exhaust tip kit is easy. First, make sure your car is the 2011 - 2021 Subaru WRX or STI. Then, remove the old exhaust tips from your COBB Titanium Cat - Back Exhaust or your custom - made exhaust. Next, slide the new tips onto the exhaust pipe using the 2.5' slip - joint inlet and secure them with the included clamps. When installing, be careful not to overtighten the clamps to avoid damaging the tips. For maintenance, clean the tips regularly with a mild automotive cleaner. Avoid using abrasive materials that could scratch the blued finish. Also, check the clamps periodically to ensure they are still tight and in good condition. This will keep your exhaust tips looking great and performing well for a long time.