The 2016–2019 Cadillac CTS-V cat-back exhaust system is designed to enhance the aggressive character of the supercharged 6.2L V8 engine by improving exhaust flow and producing a deeper, more refined exhaust note. Replacing the factory system from the catalytic converters back, a performance cat-back setup typically includes larger-diameter piping, high-performance mufflers, and quad tips, helping reduce backpressure and unlock additional horsepower while maintaining drivability and emissions compliance.