Using the HKS Hi - Power Muffler SPEC - L ZN6 is easy. Just follow the installation instructions that come with it and have it installed by a professional or someone with mechanical knowledge. When using, avoid driving through deep water to prevent water from entering the muffler. For maintenance, check it regularly for any signs of damage like cracks or loose parts. If you notice any issues, get them fixed right away. Also, a simple cleaning with a mild detergent and a soft cloth every few months can keep it looking good.