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yes because the fumes will polute the air more. Wrong The correct answer is below. The Muffler controls the volume of sound or the tone or pitch of the exhaust leaving the engine. The Catalytic Converter removes harmfull particles and gases. This is auto pollutions control 101. Removing the muffler can increase horse power and might decrease backflow pressure which influences the torgue of the engine. Some vehicles need more back pressure or less back pressure to influence torque. The factory usually uses the muffler for ascetic reasons low volume or a correct tone/pitch to a vehicle so it will have the "right sound". But removing the muffler can mean a freer flowing exhaust; which can help some vehicles especially diesels lower their exhaust gas temperatures which can make the engine remain cooler during towing situations.

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Q: Will removing the muffler on a diesel engine cause problems?
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Will removing the muffler on a diesel cause problems?

I don't think it's a question of diesel or gas. More like how new you car is. Most cars and trucks would be completely fine running without a muffler, unless there are some sort of electrical components attached. But keep in mind, besides re-routing exhaust and dampening noise, your exhaust system also uses the heat build up in the pipes to slowly cool your engine after you shut it off. Removing all pipes may cause warpage of your cylinder heads.


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