The Factory Team Precision Ground Diff Drive Rings are a great option part for those who want the best ball diff possible. The precision comes from a flatter, tighter tolerance diff ring that will result in smoother diff operation and longer life, therefore increasing time between rebuilds.
Smoother surface finish
More precise differential operation
Direct upgrade for #7666 Differentail Drive Rings
Fits RC10B4-B6 series, SC5M and SC6.1, RC10T4.1-T6.1 series, and all SC10s using ball diffs