HO SD40 Locomotive Kansas City Southern #631 (ATH87227)

HO Scale Kansas City Southern SD40 Locomotive in classic KCS livery, a ready-to-run model designed to bring the railroad’s 1970s–80s freight power to your layout. This detailed replica features an injection-molded body with a long nose, see-through cab and dynamic brake windows, finely rendered handrails, separately applied grab irons, and a painted 4,000-gallon fuel tank. It rides on Flexicoil-C trucks with RP25 wheel contours and McHenry knuckle couplers for authentic operation, while a smooth, modern motor provides quiet, reliable performance. DCC-ready Quick Plug makes digital control straightforward, and LED lighting adds dependable visibility on the layout.

Two versions are offered: a non-sound model and a sound-equipped variant. The sound version adds an onboard Tsunami2 DCC/sound decoder and dual speakers for engine, horn, and bell sounds that operate in both DC and DCC modes, with enhanced low-speed operation and MU lash-up capability. Both variants share high-fidelity detailing and decoration, designed for HO layouts and compatible with standard tracks thanks to RP25 wheels. The model is designed for HO layouts with a minimum recommended curve radius of 22 inches (18 inches minimum) to ensure smooth, trouble-free operation.