This bill amends existing laws to prohibit the installation or modification of mufflers and exhaust systems in a way that amplifies or increases the noise emitted beyond the original specifications of the vehicle. It establishes penalties for violations, which can include fines up to $500, imprisonment for up to 30 days, or both. Additionally, the bill mandates that motor vehicle inspections must now include checks for excessive or unusual noise from mufflers and exhaust systems, expanding the scope of inspections beyond just emissions and emission-related items.

The bill also introduces new provisions regarding the use of horns and warning devices on vehicles, specifying that no vehicle shall be equipped with sirens, whistles, or bells unless permitted by law. It further clarifies that bicycles cannot be equipped with sirens or whistles. The commission is granted the authority to set standards for the audibility of warning devices, and the penalties for violations of these provisions will align with existing penalties for similar infractions. Overall, the bill aims to enhance noise control measures and ensure that vehicles comply with noise regulations during inspections.