No, New Hampshire prohibits exhaust systems producing excessive noise under RSA 266:60, with violations punishable by fines up to $250. Local ordinances, such as those enforced by the Manchester Police Department, often supplement state law with stricter decibel limits. The 2026 NHDOT compliance review may introduce additional enforcement measures targeting aftermarket modifications.
Key Regulations for Loud Exhausts in New Hampshire
- RSA 266:60 bans exhaust systems emitting noise exceeding 92 decibels when measured 50 feet from the vehicle, aligning with federal EPA standards.
- Local ordinances in cities like Nashua and Portsmouth impose additional restrictions, often requiring mufflers to be maintained in good working order.
- Aftermarket modifications must comply with NHDOT’s 2026 emissions and noise compliance directives, which may include mandatory inspections for modified vehicles.
Enforcement typically occurs during routine traffic stops or noise complaints, with citations issued by state troopers or local law enforcement. Vehicles cited under this statute may face impoundment if modifications pose a safety hazard. Operators should verify compliance with municipal codes, as some towns impose stricter decibel thresholds than state law.