or, the baffles in the muffler could have collapsed. that happened to my friend's grand am and it clogged the exhaust and blew a hole in the top of the muffler and exhaust was getting trapped under the car instead of going out the back past the bumper like its supposed to
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2000 Chevrolet Malibu LS
2000 Oldsmobile Alero GL (sold)
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