6 axle Genset

Looks like UP is taking delivery of the first 6 axle Genset. But what is the model? I know the NRE calls 4 axle ones a 3GS21B so I guess it would be called a 3GS21C? (Not my pic, just for reference)

Except that those are being built by Railpower (builders of the Green Goats) so they are called RP20Cs.

I would assume the’yre going to be used in hump and transfer duties aound LA?

It might say on the Genset site-
http://www.trainweb.org/gensets/

Thanks for the info. I wondered if these were being built by NRE or Railpower.