The factory exhaust on the 981 S and GTS sounds excellent, but bulky factory catalytic converters restrict exhaust velocity and muffle the mechanical flat-six tone. Opening up the exhaust pathway with high-flow Exhaust Downpipes or aftermarket headers reduces backpressure and unlocks trapped horsepower. Pairing these with a valved or non-valved Cat-Back Exhausts system completely transforms the acoustic profile of your Porsche. Check out our Misc Exhaust Parts for the specific clamps, hardware, and O2 sensor spacers required to dial in a perfect fitment.