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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Description & Operation >> Muffler

Description & Operation: Muffler

The exhaust muffler reduces the noise levels of the engine exhaust by the use of tuning tubes. The tuning tubes create channels inside the exhaust muffler that lower the sound levels created by the combustion of the engine.