Vehicle Code section 27150.1

No person engaged in a business that involves the selling of motor vehicle exhaust systems, or parts thereof, including, but not limited to, mufflers, shall offer for sale, sell, or install, a motor vehicle exhaust system, or part thereof, including, but not limited to, a muffler, unless it meets the regulations and standards applicable pursuant to this article. Motor vehicle exhaust systems or parts thereof include, but are not limited to, nonoriginal exhaust equipment.
A violation of this section is a misdemeanor.

Source: Section 27150.1, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=VEH§ionNum=27150.­1.­ (updated Jan. 1, 2003; accessed Dec. 29, 2025).

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Verified:
Dec. 29, 2025

§ 27150.1's source at ca​.gov