All locomotives feature prototype-specific, separately applied "as-built" and/or "modernized" injection-molded and photo-etched metal detail parts and cab interior.
Modernized A-units are equipped with all or some of the following as appropriate:
• Eyebrow grabs • Nose-side ladder grabs
• Sunshades • Ladder-rest grabs
All modernized units are equipped with the following:
• Screw-mounted chassis
• Individual window "glass"
• Detailed battery boxes/air tank with brackets
• Fully detailed 1200-gallon or 1500-gallon fuel tank with brackets
• Partial or complete de-skirting if needed
• Lift lugs (as appropriate), front and rear
• MU hoses, coupler cut levers, and air hoses, front and rear

Athearn Genesis® F units are now available in "Modernized" configurations where prototypically appropriate.
• New factory-installed onboard Tsunami sound and DCC decoder!
• Individual sound boards installed in both the A-unit and B-Unit.
• Sound units are Dual-mode, compatible with both DCC and DC operations.
• In DCC mode, all functions are NMRA compatible.
• In DCC mode, you can program an MU lashup with lead unit only horn, bell and lights.
• Fully functional headlights and Mars lights (where applicable) in both modes.
• Operating back-up light (where applicable).
• Genesis driveline with dynamically balanced five-pole skew-wound motor and flywheels.
• Directional constant lighting.