A performance exhaust system is an aftermarket upgrade designed to improve a vehicle's exhaust flow. By reducing back pressure, these systems allow the engine to expel exhaust gases more efficiently, which can enhance horsepower and torque. They often feature larger pipes, high-flow catalytic converters, and less restrictive mufflers. In addition to performance benefits, a performance exhaust system can also change the sound of a vehicle. Many enthusiasts appreciate the deeper, more aggressive tone that these systems provide. Popular brands include Borla, MagnaFlow, and Flowmaster, each offering various designs tailored to different vehicle models.