Our Silicon Nitride (Ceramic) diff balls are lighter, harder and rounder than any steel or carbide diff ball. Install these diff balls and your diff will instantly have smoother action and more consistency. Both are absolutely key elements if you want to win races! This pack includes 12-3/32" and 6-5/64" balls for outfitting most dirt oval cars and also most of the Associated off road cars such as the RC10B4, B5, B6.
- Si3N4 Silicon Nitride Ceramic Construction
- Black in color
- Approx. 30% lighter than steel diff balls