No, Arizona prohibits modified exhaust systems producing excessive noise under ARS §28-955(A), with local jurisdictions like Phoenix and Tucson enforcing decibel limits via police citations. Violations incur fines up to $250, and repeat offenses may trigger impoundment under 2024 Maricopa County ordinances.
Key Regulations for Loud Exhausts in Arizona
- Decibel Limits: Exhaust noise exceeding 92 dB at 50 feet violates state law, per ARS §28-955(A), with stricter local thresholds (e.g., Phoenix caps at 88 dB for motorcycles).
- Modification Bans: Aftermarket exhausts must retain factory-installed mufflers or equivalent EPA-approved systems; cutouts, bypasses, or straight pipes are explicitly prohibited.
- Enforcement Shifts: Maricopa County Sheriff’s Office and Tucson Police Department prioritize noise violations post-2023, using handheld decibel meters during traffic stops.
Local agencies defer to Arizona Department of Transportation (ADOT) guidelines, which align with federal EPA standards. Courts in Pima and Pinal Counties have upheld impoundment orders for third-offense violations under 2025 legislative amendments. Owners may contest citations via administrative hearings within 15 days.