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The muffler we chose to test is the new Flowmaster two-chamber, Super 44 muffler in a 4-inch case. This is Flowmaster's most aggressive muffler, so we're really putting the sound level to the test. The top muffler is a 2 11/42-inch while the bottom is the more aggressive 3-inch. According to Flowmaster's Kevin McClelland, minimizing the offset between the muffler's inlet and outlet improves power. View Related Article
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