HO GEN 4-8-8-4 Big Boy Locomotive UP 4000 (ATHG-2195)

Union Pacific UP 4000 — an HO-scale Genesis 4-8-8-4 Big Boy steam locomotive — brings the iconic 4-8-8-4 Big Boy to an HO layout. This high-detail model faithfully recreates UP’s legendary locomotive and is designed for dramatic display as well as prototypical operating sessions on a model railroad.

Authentic detailing includes illuminated number boards and headlights, a tender back-up light, and a boiler backhead with printed gauges, while pivoting front and rear engines and a reinforced loco-to-tender harness help the model negotiate 22-inch curves on typical HO layouts. It features an on-board DCC decoder with SoundTraxx Tsunami2 sound and dual speakers for synchronized engine, whistle, and other effects, with full DC and DCC operation and NMRA-compatible CVs for fine-tuning. Road-number-specific variations and Legendary Liveries offer authentic UP schemes, including delivered units and grime-ready finishes such as #4000 delivered, #4003 Primed for Grime, #4019 Smoke Lifters, and #4020/#4024 Greyhound, providing a weather-ready centerpiece for any layout.