Using this MBRP exhaust is simple. First, follow the included installation instructions carefully to bolt it onto your Subaru WRX or STI. Once installed, you'll immediately notice the improved power and the moderate exhaust sound. As for maintenance, regularly check the exhaust for any signs of damage, especially if you drive in areas with snow and salt. Wipe it down occasionally to keep it clean. Avoid hitting the exhaust on rough terrain, as this could cause dents or cracks. If you have any issues, contact the manufacturer, as it comes with a lifetime warranty.