Using the Tomei Full Titanium Muffler Kit is straightforward. First, make sure your car is an Infiniti G35 Coupe from 2003 - 2007 as this kit is specifically designed for it. The installation hardware is included, so you can easily put it on your vehicle. When installing, ensure all parts are properly aligned and tightened to avoid any leaks. As for maintenance, regularly check the muffler and pipes for any signs of damage or corrosion. Since it's made of titanium, it's quite durable, but keeping it clean will help maintain its performance and appearance. Also, be aware that the aggressive sound might not be suitable for all environments, so use it responsibly. If you want to further enhance your exhaust system, you can purchase the Tomei Full Titanium Mid Y - Pipe separately.