Union Pacific Yard (UPY) #2101, MP20GP, former GP50 rebuilt by MPI with a CAT 3516C topping out at 2000hp. This unit is being constructed because of a generous donation from my wife. She bought a UP GP50, which UP no long runs stock, these and some slugs are all thats left, I figure this is more viable to see on run-through. For pictures of the prototype click here I'm now planning to build all 12 (UPY 2100-2112), selling 10 of them. If you're interested in buying one please let me know at josh AT blockchoice.com.