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California Exhaust & Muffler Laws (2026)

Info: Adequate muffler, no cutout/bypass; under-6,000-lb vehicles capped at 95 dBA (SAE J1169); aftermarket exhaust must be CARB-legal — CVC §§27150-27151, 27156.

InfoVerified Jun 19, 2026

Adequate muffler, no cutout/bypass; under-6,000-lb vehicles capped at 95 dBA (SAE J1169); aftermarket exhaust must be CARB-legal — CVC §§27150-27151, 27156.

Official source: leginfo.legislature.ca.gov →

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