GT-TD04
Supermoderator
B–111
Silencer
(1) Every vehicle propelled by an internal combustion engine shall, subject to the provisions of sub-article (2) of this article, be fitted with an exhaust silencer or other device suitable and sufficient for reducing to a reasonable level the noise caused by the escape of exhaust gases from the engine.
(2) Sub-article (1) of this article shall not apply to a vehicle taking part in a trial, competition or race carried out on a road closed under section 35 of the Local Government Act, 1955 (No. 9 of 1955), subject to any conditions the local authority concerned may impose in connection with such closing.
B–112
Emission of smoke, etc.
(1) Every vehicle shall be so constructed as to prevent, to such extent as is reasonably possible, the emission of smoke, visible vapour, noxious gases or offensive odours.
(2) Every vehicle using solid fuel shall be fitted with an efficient appliance for the purpose of preventing the emission of sparks or grit and also with a tray or shield to prevent ashes or cinders from falling on the ground.
(3) A vehicle (other than a works truck or a vehicle registered before the 1st day of July, 1964) which is propelled by a compression ignition engine shall not be fitted with a device designed to facilitate the starting of the engine by causing it to be supplied with excess fuel unless—
(a) the device is so designed that it cannot cause the engine to be supplied with excess fuel after the engine has been started, or
(b) the device cannot be readily operated by a person while he is carried on the vehicle.
Reasonable is subject to the Garda in question,nor do they need any equipment.
The only good defense is that you damaged your exhaust on your trip.
this was taken from Construction Equipment Uses of Vehicles Act 1963