An exhaust system connects to your engine and guides the emissions through a pipe under your car. This system helps remove toxic chemicals and reduces noise. If you need to replace your system, you can install a new one from the catalytic converter to the tailpipe with a few tools. You’ll need to disconnect the oxygen sensors from under your vehicle by putting a wrench around the bolt connecting the sensor to the pipe and rotating it counterclockwise until it’s loose. Then, starting where the exhaust pipe connects to the engine, unscrew the nuts with a ratchet. Unhook the pipes from the rubber exhaust hangers and pull the exhaust system down. Once your old system is out, you can position the new system so it lines up with the downpipe leading to your engine. Plug the oxygen sensors back into the ports and slide the metal pins on the system into the rubber exhaust hanger to secure the pipe. To learn how to test the new system for leaks, keep reading!