Using this Revel Medallion Touring - S exhaust on your 2002 - 2007 Subaru WRX/STI is straightforward. First, make sure to check if you have a stock j - pipe or downpipe. If so, install the GrimmSpeed adapter p/n 077046 before attaching the exhaust. When installing, ensure all connections are tight to avoid leaks. For day - to - day use, you don't have to worry too much about excessive noise. This exhaust gives you power without being a nuisance. To maintain it, regularly check the stainless - steel parts for any signs of rust or damage. A simple wipe - down with a mild cleaner can help keep it looking good and functioning well. If you notice any issues with the hangers or gaskets, replace them promptly to ensure the exhaust system continues to work properly.