Michigan Compiled Laws, Chapter 257. Motor Vehicles § 257.707c

Sec. 707c. (1) A motor vehicle must not be operated or driven on a highway or street if the motor vehicle produces total noise exceeding 1 of the following limits at a distance of 50 feet except as provided in subdivisions (b)(iii) and (c)(iii):

(2) A dealer shall not sell or offer for sale for use upon a street or highway in this state a new motor vehicle that produces a maximum noise exceeding the following limits:

(3) A person shall not operate a vehicle on a highway or street if the vehicle has a defect in the exhaust system that affects sound reduction, is not equipped with a muffler or other noise dissipative device, or is equipped with a cutout, bypass, amplifier, or a similar device.

(4) A person, either acting for himself or herself or as the agent or employee of another, shall not sell, install, or replace a muffler or exhaust part that causes the motor vehicle to which the muffler or exhaust part is attached to exceed the noise limits established by this act or a rule promulgated under this act.

(5) A person shall not modify, repair, replace, or remove a part of an exhaust system causing the motor vehicle to which the system is attached to produce noise in excess of the levels established by this act, or operate a motor vehicle so altered on a street or highway.

(6) A dealer shall not sell a used or secondhand motor vehicle for use upon a street or highway that is not in compliance with this act.

(7) A person who violates this section is responsible for a civil infraction and shall be ordered to pay a civil fine of not more than $100.00.