Silencers Silencers SlideshowImage There are three main silencing techniques, sometimes combined together in the same device: Absorbtion, based on the use of sound-absorbing materials. Reflection, obtained through the expansion of exhaust gases from the pipes to the volumes of the muffler chambers. Resonance, obtained by connecting acoustic elements, connected to expansion chambers. Magneti Marelli Exhaust Systems produces: Rolled silencers - Rolled silencers meet the Customer’s specifications with low costs and reduced weights. Stamped silencers - Specific solutions involving stamped silencers are used to maximize the silencing volume for high-level cars.