@rokrsdriveclub: This is a Cheat Sheet to help you learn about cars. bookmark this and send it to a friend that wants to learn about cars. #1 A muffler is a device that reduces the noise emitted from the engine. #2 The resonator works along side the muffler in that it removes high-pitched noises along with with hums and buzzes. It creates a smoother exhaust note, without affecting volume. #3 A catalytic converter is a device that controls emissions. It turns harmful gases into safer ones. But don’t inhale it. in most cases it is the most restrictive part of your exhaust system. #learningaboutcars #cartok #cartest #carknowledge #carexhaustquiz