Section 27150.3 Of Article 2. Exhaust Systems From California Vehicle Code >> Division 12. >> Chapter 5. >> Article 2.
27150.3
. (a) A person may not modify the exhaust system of a motor
vehicle with a whistle-tip.
(b) A person may not operate a motor vehicle if that vehicle's
exhaust system is modified in violation of subdivision (a).
(c) A person may not engage in the business of installing a
whistle-tip onto a motor vehicle's exhaust system.
(d) For purposes of subdivisions (a) and (c), a "whistle-tip" is a
device that is applied to, or is a modification of, a motor vehicle'
s exhaust pipe for the sole purpose of creating a high-pitched or
shrieking noise when the motor vehicle is operated.