ST Racing Concepts has teased a few prototype pictures for some things they are working on for the all new Axial Yeti

In picture:

Rear cage stiffener

Rear upper suspension link

Rear lower suspension link

Rear upper shock mount plate

Motor Mount/Motor Cam combo

Option parts in picture that are already available:

STA80072R Axle Rear upper link mount

STA80070X Axle Lower suspension link mount/sway bar mount

STA80070D Rear Diff Cover

STA80071 Rear Lock-out