Using your Remark R1 Spec Cat back exhaust is easy. First, make sure your car is parked on a flat surface and the engine is cool. Then, simply follow the direct bolt - on installation steps with the included gaskets and bolts. When driving, enjoy the increased power and the aggressive sound. For maintenance, regularly check the exhaust for any signs of damage or loose connections. Keep it clean by washing it with mild soap and water, avoiding abrasive cleaners that could damage the stainless steel. If you notice any unusual noises or performance issues, it's a good idea to have it inspected by a professional. Remember, this exhaust is designed for specific Subaru models from 2015 - 2021, so don't try to use it on other vehicles.