INTRODUCTION 9 Tampering with Noise Control System Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inoperative by any person, other than for purposes of maintenance, repair, or replacement, of any device or element of design incorporated into any new vehicle for the purpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use; or (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any person. Among the acts that constitute tampering are the acts listed below:
Removal, or rendering inoperative, of any exhaust components, including mufflers, heavy or double-wall exhaust tubing, flexible tubing or exhaust pipe clamping. Removal, or rendering inoperative, of the temperature-modulated cooling fan system. Removal of the cooling fan shroud. Removal, or rendering inoperative, of the air cleaner or air intake in-line silencer. Removal of the sound deadening material from the hood or cab tunnel. Removal, or rendering inoperative, of the engine speed governor so as to allow engine speed to exceed the manufacturer’s specifications. Removal of splash shields located inside the wheel housings. Removal of engine block shields.
Removal of engine crankcase shields or insulation. Removal of insulated rocker arm covers.