Milltek Active Sound Control Single Sound Generator Kit Honda / Acura e (BEV) Standard and Advance Models 20-25Milltek Active Sound Control Single Sound Generator Kit Honda Acura e (BEV) Standard and Advance Models 20 25 Active Sound (ASU) from Milltek Sport is an innovative solution to enable a user controllable exhaust sound to be made on vehicles that traditionally lack the sound and tone that owners desire; suitable for a wide range of vehicles, the growing range includes Hybrid's, EV and diesels. Including 11 selectable sound files, volume, pitch and tone