Using your Remark axle back exhaust is a breeze. First, make sure your Subaru WRX is parked on a flat and stable surface. Since it's a direct bolt - on to the OEM or Remark mid Y - pipe, you can easily install it with the included gaskets and bolts. Just follow the instructions carefully and you'll have it up and running in no time. When it comes to maintenance, it's a good idea to regularly check the bolts to ensure they're tight. You can clean the double - wall burnt stainless tips with a mild stainless - steel cleaner to keep them looking shiny. Avoid using abrasive materials as they may scratch the surface. If you notice any unusual noises or performance issues, it's best to have it inspected by a professional. Enjoy the enhanced power, torque, and the great Subie sound that this exhaust brings to your ride.