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Sound. Every exhaust system or muffler has its own unique sound. You can add a Magnaflow muffler to your exhaust for a pleasing, slightly louder-than-stock tone, or you can get an aggressive growl out of a glasspack Cherry Bomb muffler.ufflers. If your exhaust system ended at the catalytic converter, your vehicle would be obnoxiously loud and noisy-far from the high-performance growl you know and love. As their name implies, mufflers reduce the noise coming out of your exhaust to less-than-deafening levels.
Install the chip then hook the car up to the exhaust sniffer at the test station. If the result is in a normal range (14:1 to 1 or lower) then you're good to go. If the mixture is excessively rich (you'd flunk the smog check) remove the part and throw it away. 1 person found this useful.