HO GEN SD90MAC Locomotive with DCC and Sound, NS 'Ex-CIT' #7331 (ATHG-1939)

HO-scale Athearn Genesis EMD SD90MAC diesel locomotive with DCC and sound, in Norfolk Southern Ex-CIT livery with road number 7331, is a ready-to-run model designed for HO-layout enthusiasts. This detailed locomotive captures the prototype’s imposing presence with a heavy die-cast frame, LED lighting, a full cab interior, see-through steps, and finely rendered exterior details that bring the NS Ex-CIT scheme to life on a layout.

Powered by an onboard DCC decoder with SoundTraxx Tsunami2 sound and dual speakers, it delivers authentic engine, horn, and bell sounds in DCC mode and remains operable on DC. The model is DCC-ready with Quick Plug 21-pin NEM connector and features include body-mounted scale knuckle couplers, a robust five-pole driveline with precision flywheels and all-wheel drive, and RP25 wheel contours for reliable tracking. Road-number-specific detailing includes the NS Ex-CIT #7331 blue cab patch, along with nose-door options and other prototype cues such as etched see-through steps and lit number boards. A minimum layout radius of 18 inches is recommended, with 22 inches preferred for smooth operation on typical hobby layouts.