Sound Chassis w/Soundtraxx Tsunami for Stewart FT Units -- B Powered w/Silver Sideframes

Replacment chassis for F units makes it easy to add sound and DCC to new or older units. Each includes a high quality digital decoder with motor control and a digital sound module on one circuit board. The sound is adjusted to the running mode: when the loco starts moving, you hear the primemover rev up and when it stops, you hear the engine slow down and braking sounds. All units come with a decoder featuring the 16-cylinder EMD 567 prime mover, dynamic brakes, and a single chime air horn.