Originally Posted by psychos2
Here is a copy of the maryland law:
§ 22-402. Mufflers; prevention of noise; discharge of smoke; maximum period of idling.
(a) Mufflers.- Every motor vehicle with an internal combustion engine shall be equipped with an exhaust muffler system in good working order and in constant operation to prevent excessive or unusual noise, and no person may use a muffler cutout, bypass, or similar device on a motor vehicle on a highway. Noise levels in excess of those adopted by the Administrator under § 22-601 of this title are excessive.
(b) Prevention of noise.- A person may not use on the exhaust or "tail pipe" of a motor vehicle any extension or other device to cause excessive or unusual noise.
And here is what the administrator says:
§ 22-601. Motor vehicle operation - Establishment of sound level limits.
(a) Administrator to establish limits.- With the endorsement of the Secretary of Transportation and the Secretary of the Environment and after a public hearing following 60 days' notice, the Administrator shall adopt regulations that establish maximum sound level limits for the operation on the highways in this State of each type of motor vehicle or combination of vehicles.
(b) Scope of limits.- In establishing limits under this section, the Administrator shall:
(1) Consider any noise emission regulations established under federal law for motor carriers engaged in interstate commerce; and
(2) Set the limits at the most restrictive level that, through the application of the best available technology at a reasonable cost, is consistent with attaining the environmental noise standards adopted by the Department of the Environment.
shawn