Oklahoma Statutes (Last Updated: September 18, 2014)

§ 47-12-402. Mufflers or other noise-suppressing systems - Prevention of excessive or unusual noise.

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A. Every vehicle shall be equipped, maintained, and operated so as to prevent excessive or unusual noise. Every motor vehicle shall at all times be equipped with a muffler or other effective noise-suppressing system in good working order and in constant operation, and no person shall use a muffler cut-out, bypass or similar device. No person shall modify the exhaust system of a motor vehicle in any manner which will amplify or increase the noise or sound emitted louder than that emitted by the muffler originally installed on the vehicle.
B. The engine and power mechanism of every motor vehicle shall be so equipped and adjusted as to prevent the escape of excessive fumes or smoke, or both.

Added by Laws 1961, p. 407, § 12-402. Amended by Laws 2003, c. 411, § 51, eff. Nov. 1, 2003.

                    
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