The POLMO brand Middle Silencer is located in the middle of the vehicle under the floor. It is aligned on one side with the downpipe, and on the other through the swivel ring with the rear silencer. The resonator of the exhaust system is responsible for the distribution of the energy received from the exhaust gases and its extinguishing by the expansion method. Due to the presence of special chambers, energy is dissipated in them, reflected from the walls, which avoids unnecessary vibrations and significantly reduces exhaust noise.

In addition, the resonator of the exhaust system reduces the resistance of the system to the movement of exhaust gases by smoothing out pulsations.

1. C25 Bus (280_, 290_)
2. J5 Bus (280P)
3. J5 Platform/Chassis (280L)
4. J5 Bus (290P)
5. DUCATO Panorama (280_)
6. DUCATO Panorama (290_)
7. J5 Van (290L)
8. DUCATO Van (280_)
9. DUCATO Platform/Chassis (290_)
10. DUCATO Van (290_)
11. J5 Platform/Chassis (290L)
12. J5 Van (280L)
13. C25 Van (280_, 290_)
14. C25 Platform/Chassis (280_, 290_)
15. DUCATO Platform/Chassis (280_)
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The construction of the middle silencer

Based on the design features, the middle part of the silencer can include a number of chambers or be straight-through. In some cases, during the production process, the stainless steel from which the elements of the muffler are made is covered with a layer of aluminum alloy or a special sound-insulating material.