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What is dot rule on exhaust for a semi?

Updated: 8/20/2019
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11y ago

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  • No part of the exhaust system can be located where the fumes could cause burning, charring, damage to the fuel supply, the wiring or any combustible section of the vehicle.

  • The system cannot discharge exhaust below the fuel tank or fuel tank filler pipe, forward of the semi's cab or below the cab or sleeper compartment.

  • The exhaust system must be securely fastened to the vehicle but may be installed on a hanger that allows for the movement of the system during the operation of the vehicle and that allows for the natural expansion and contraction of the exhaust fumes.

  • No wrap or patch can be used to repair. Only permanent repairs are allowed EG: welded in patches or pieces etc.

  • And don't forget the bewildering array of maximum noise laws across the country.

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Q: What is dot rule on exhaust for a semi?
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