A device (12) for air/fuel manifolds (11) adapted to generate turbulent flows in combustion chambers, which device (12) comprises a flanged main body (15) and at least one injector (22), said flanged main body (15) comprising, in its turn, a plurality of runners (16) each of which is in fluid-dynamic communication, at one end, with a corresponding upstream runner (14) belonging to the air/fuel manifold (11) and, at another end, with a corresponding combustion chamber to which an air/fuel mixture is supplied;
- a device (12) wherein each runner (16) internally comprises a longitudinal baffle (17) adapted to form two channels (18, 19) each having a respective flow of air/fuel mixture to the combustion chamber, in one channel (18) being housed a throttle (20) having, in its fully closed position, an aureole (24) which extends along the whole perimeter of the throttle (20);
- the device (12) being characterised in that the longitudinal baffle (17) has a port (23) for communication between the two channels (18, 19), and in that a jet (GET) of fuel generated by said at least one injector (22) is targeted on the port (23) for communication between the two channels (18, 19).