ChrisFix sets out to settle a garage argument that never seems to end: does a performance exhaust actually make more horsepower, or does it just sound like it does? He tears into a full cat-back install, high-flow cats, an X-pipe, and straight pipes, and puts the results on a dyno before and after. Along the way, one unscripted moment involving his own mother became more famous than the horsepower numbers themselves.