Do the hyper 9 fit the ultralights, vbs and will the ue drive cups works for them.

Based on my latest findings & discussions, it seems like the Hyper 9 diffs are slightly different to all the others ( 6/7/8 etc ), or atleast they have different part numbers for the ring & pinion gears; you are better off staying with the earlier models or Hotbodies lightning buggy diffs, to be 100% certain they will fit the UE diffs and VBS bulks. UE drive cups should work, given that their diffs are actually just Ofna Spider diffs regardless.

Ok thats for the reply