To use this exhaust, simply have it installed by a professional mechanic on your 17+ Honda Civic Si Sedan (FC). When driving, you'll notice improved performance and a cool exhaust sound. As for maintenance, regularly check the exhaust for any signs of damage like cracks or loose parts. Clean it occasionally with a mild soap and water solution to keep it looking good. Make sure to avoid driving through deep water as it can damage the exhaust components. If you hear any strange noises, have it inspected right away.