IS MY MOD LEGAL?

Exhaust Noise in Pennsylvania

Vehicle type: Truck

Conditional

Pennsylvania requires an adequate muffler and sets PennDOT 50-foot limits of 76–92 dBA by class and speed; there is no 95 dB tailpipe test.

Verified against primary sources · August 2026

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Frequently Asked Questions

Are exhaust noise legal in Pennsylvania?
Pennsylvania requires an adequate muffler and sets PennDOT 50-foot limits of 76–92 dBA by class and speed; there is no 95 dB tailpipe test.
What are the exhaust noise limits in Pennsylvania?
Pennsylvania requires an adequate muffler and sets PennDOT 50-foot limits of 76–92 dBA by class and speed; there is no 95 dB tailpipe test. For specific numeric limits and thresholds, see our full compliance report.
Are there exceptions for exhaust noise in Pennsylvania?
Yes, there may be exceptions and exemptions. Get the full details including medical exemptions and edge cases in our compliance report.

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