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What is the difference between a 40 series and a 50 series muffler?

April 26, 2017difference muffler SERIES

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What is the difference between a 40 series and a 50 series muffler?

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Both mufflers have the same sound outside the vehicle, but each has varying sound levels generated inside the vehicle. The 40 series (two chamber) will resonate inside the vehicle, generally around 1800-2000 rpms and also again around 2400-2600 rpms. The 50 series (three chamber) incorporates an H-chamber that helps eliminate this interior resonance in the cab area of your vehicle.