Using this Tomei catback exhaust is straightforward. First, make sure your car is a 2008 - 2014 Subaru STI Hatchback or a 2011 - 2014 Subaru WRX Hatchback. If your vehicle has the factory downpipe or J - pipe, get an adapter from GrimmSpeed before installation. When installing, follow the standard exhaust installation procedures. As for maintenance, keep it clean. Regularly check for any loose parts or signs of damage. You can wash it gently with mild soap and water to keep it looking good. Also, listen for any unusual noises, which could indicate a problem. That's all you need to know to enjoy this great exhaust system.