From Exotek Racing:
Ultra light 7075 hard anodized aluminum rear differential cups for use with MIP Puck Bones for the 22-4 2.0 buggy.
Our puck cups only weighs 2.8gr for BOTH versus the 7.2gr for both stock steel cups.
Converts the rear diff to accept super light weight MIP B64 Rear 65mm Puck bone set #MIP17042 or use Exotek 66mm Puck Bones #1793 (note 67mm puck bones runs too deep into the cups)
For use only with stock spec 13.5 and 17.5 racing and in the rear 22-4 2.0 gear diff.
Note- uses the stock de-greased set screws and requires properly applied blue thread lock.