ScaleTrains Rivet 38791 HO Scale EMD SD40-2 Conrail Quality CR 6442 - DCC & Sound EDF - Motor The prototype GS-4 runs on

The prototype GS-4 runs on eight massive 80" drivers

and side-mounted weapon pods

and special alloy wheels

Realistic kit based on prototype railroad standard designs

ScaleTrains Rivet 38791 HO Scale EMD SD40-2 Conrail Quality CR 6442 - DCC & Sound EDF - Motor The prototype GS-4 runs onScaleTrains Rivet 38791 HO Scale EMD SD40 2 Conrail Quality CR 6442 DCC & Sound In January 1972, the Electro Motive Division (EMD) of General Motors would build the first production models of a locomotive design that would prove to be legendary: the SD40 2. As the flagship of the Dash 2 series, the SD40 2 would build upon the lessons learned from its predecessor, the SD40. While the sixteen cylinder 645E3 turbocharged prime mover remained the same