Using your new Remark axle back exhaust is simple. First, make sure your car is parked on a flat and stable surface. If you're installing it yourself, gather the necessary tools like wrenches. Then, carefully remove the old exhaust and bolt on the new one to the OEM or Remark mid Y - pipe. The gaskets and bolts are included, so you don't have to worry about sourcing them. When driving with the new exhaust, enjoy the enhanced power, torque, and that sporty Subie sound. As for maintenance, regularly check the bolts to ensure they're tight. You can also clean the exhaust tips with a mild stainless - steel cleaner to keep them looking shiny. Avoid using abrasive materials as they can scratch the surface. If you notice any strange noises or vibrations, it's a good idea to have the exhaust checked by a professional.