No, Michigan prohibits exhaust systems producing excessive noise under the Michigan Vehicle Code (MCL 257.707a), with violations punishable by fines up to $100. Local jurisdictions like Detroit and Grand Rapids enforce stricter decibel limits, often via municipal noise ordinances. The 2026 update to MCL 257.707a tightens enforcement, requiring periodic decibel testing for modified vehicles.
Key Regulations for Loud Exhausts in Michigan
- Decibel Limits: Exhaust noise exceeding 92 dB(A) measured at 50 feet is illegal under state law, with local ordinances often imposing stricter limits (e.g., 88 dB(A) in Detroit).
- Modified Systems: Aftermarket exhausts must comply with federal EPA noise standards (40 CFR 205) and Michigan’s tampering prohibitions (MCL 257.707a(2)).
- Enforcement: Law enforcement may issue citations based on subjective noise assessments or calibrated decibel meters, with repeat offenders facing vehicle impoundment under local ordinances.
Local agencies, including the Michigan State Police and county sheriffs, conduct targeted enforcement campaigns, particularly in urban areas. The 2026 regulatory shift mandates decibel testing for vehicles with altered exhaust systems during annual inspections. Violators face escalating penalties, including mandatory muffler replacements.