A dual exhaust is an automotive term that refers to a vehicle with two separate tailpipes, each connected to one cylinder bank on either side of the engine. This means that there are two separate exhaust systems for the left and right sides of the car's engine. The purpose behind having a dual exhaust system is to improve performance by reducing backpressure and increasing airflow through the engine. It also enhances the sound of the vehicle, providing a more powerful and distinctive note. Dual exhaust systems are commonly found on high-performance vehicles or those that require increased power output such as trucks and sports cars.