any exhaust mod in mass is illegal, whether it says 50 state legal or not

 

Yep even just putting aftermarket tips on your exhaust in Mass is illegal.....any alteration to a factory or factory replacement is illegal in our wonderful state!

 

does this apply to motorcycles, espically harleys? because they are quite a bit louder. like annoying loud. are there any laws agaisnt them?

 

im pretty sure it does but not 100%, ill see if i can get the CH. SEC. from MGL tomorrow from my dad, he doesnt do much at work

 

the laws are written under M.V. so a bike would fall under that law,i have to try to find the updated law about any/all exhaust modification
Chapter 90: Section 16 Offensive or illegal operation of motor vehicles

Section 16. No person shall operate a motor vehicle, nor shall any owner of such vehicle permit it to be operated, in or over any way, public or private, whether laid out under authority of law or otherwise, which motor vehicles are prohibited from using, provided notice of such prohibition is conspicuously posted at the entrance to such way. No person shall operate a motor vehicle, nor shall any owner of such vehicle permit it to be operated upon any way, except fire department and fire patrol apparatus, unless such motor vehicle is equipped with a muffler to prevent excessive or unnecessary noise, which muffler is in good working order and in constant operation, and complies with such minimum standards for construction and performance as the registrar may prescribe. No person shall use a muffler cut-out or by-pass. No person shall operate a motor vehicle on any way which motor vehicle is equipped (1) with a muffler from which the baffle plates, screens or other original internal parts have been removed and not replaced; or (2) with an exhaust system which has been modified in a manner which will amplify or increase the noise emitted by the exhaust. No person operating a motor vehicle shall sound a bell, horn or other device, nor in any manner operate such motor vehicle so as to make a harsh, objectionable or unreasonable noise, nor permit to escape from such vehicle smoke or pollutants in such amounts or at such levels as may violate motor vehicle air pollution control regulations adopted under the provisions of chapter one hundred and eleven. No siren shall be mounted upon any motor vehicle except fire apparatus, ambulances, vehicles used in official line of duty by any member of the police or fire fighting forces of the commonwealth or any agency or political subdivision thereof, and vehicles owned by call fire fighters or by persons with police powers and operated in official line of duty, unless authorized by the registrar. No person shall use on or in connection with any motor vehicle a spot light, so called, the rays from which shine more than two feet above the road at a distance of thirty feet from the vehicle, except that such a spot light may be used for the purpose of reading signs, and as an auxiliary light in cases of necessity when the other lights required by law fail to operate.

 

That's true. Cops take things differnetly in different locations.

I'm going to get the book that has all the automotive codes so I can see where to stop when modifing the car that I hope to get in the next 5 years. Hopefulyl I can put the exhaust pipes through the hood! (saw it on a T/A, and loved it!)