Abstract: In an exhaust system of an internal combustion engine installed on an automotive vehicle having a body structure wherein the exhaust system includes exhaust-system component units such as an exhaust pipe and an exhaust-cleaning catalytic converter, an exhaust unit support device for having the exhaust-system component units mounted on the vehicle body structure, comprising a first coupling member securely mounted on at least one of the exhaust-system component units, a second coupling member securely attached to the body structure, an elastic support member having a portion securely attached to the first coupling member and a portion securely attached to the second coupling member, and a vibration-damping block having a portion connected to the second coupling member and a portion connected to the vehicle body structure.

Abstract: A power-unit mounting structure for mounting a power unit such as an internal combustion engine on the body structure of an automotive vehicle, comprising a plurality of shock and vibration dampening units each comprising a resilient insulator block securely connected between the body structures of the vehicle and the power unit, wherein the shock and vibration dampening units include a pair of shock and vibration dampening units, the respective insulator blocks of which are disposed in such a manner as to produce shear stresses in directions parallel with each other and inclined with respect to the vehicle body structure at a predetermined angle of, preferably, 45 degrees to vertical and horizontal planes.