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Pennsylvania Exhaust & Muffler Laws (2026)

Info: Your vehicle needs a muffler. Cutouts, bypasses (which route exhaust around the muffler), and noise-amplifying changes are prohibited.

InfoVerified Jun 19, 2026

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Your vehicle needs a muffler. Cutouts, bypasses (which route exhaust around the muffler), and noise-amplifying changes are prohibited. Sound limits are set by Department regulation; the statute itself sets no fixed decibel number (75 Pa.C.S. § 4523).

Official source: legis.state.pa.us →

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