← Pennsylvania driving laws›Exhaust & Muffler

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

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 →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Don't get caught off guardGet a push the moment Pennsylvania law changes — or when you cross into a state where it's different. Free.Get the free app

LawLert is an independent app, not affiliated with any government — informational only, not legal advice. Verify with a licensed attorney in your jurisdiction.