266:117 Equipment Authorized for Antique Motor Vehicles. – Exhaust systems discharging along the side of the vehicle shall be allowed on antique motor vehicles, provided the exhaust discharge point is to the rear edge of either door if the vehicle has 2 doors and to the rear edge of either rear door if the vehicle has 4 doors, and any such system shall direct exhaust gas away from the vehicle. Source. 2022, 81:1, eff. July 19, 2022.
New Hampshire Legal Code