Using this HKS Carbon Titanium Cat Back Exhaust is straightforward. First, make sure your car is a 2002 - 2007 Subaru WRX or 2004 - 2007 STI. The exhaust hangers are welded onto the OEM locations, so it should fit directly. Just follow the included installation instructions to attach it properly. As for the gasket and hardware, use them as provided to ensure a good seal. Remember, if you have a stock j pipe or downpipe, you'll need to buy the GrimmSpeed adapter separately. For maintenance, regularly check the exhaust for any signs of damage, like cracks or loose parts. Keep it clean by wiping it down with a mild cleaner. This will help keep your exhaust in top shape and maintain its performance and appearance over time.