Engine's exhaust noise reducing device for e.g. trail bike, has cylinder cased on silencer, adapted to all diameters of silencer and including venturi and vortex to evacuate exhaust gases without turbulence, and screw to fix device

摘要

The device has an aluminum cylinder (1) cased on a silencer (2) and adapted to all diameters of the silencer. The cylinder is provided with an input side venturi (3) and an output side vortex (4) for evacuating exhaust gases (6) without turbulence. The side vortex has a diameter that is reduced towards exterior. A fixation screw i.e. BTR screw, fixes the device at 45 degree without piercing the silencer.