Tamiya 51763 TRF421/TRF421X Front Direct Cup Set (2pcs)  [51763]

Replacement and stiffness upgrade for TRF421 front drivetrain

This pair of front direct cups is a scale spare for the TRF421X chassis and can replace worn components or be fitted as a stiffness upgrade on TRF421 models. The package contains 2 pcs front direct cups and 2 aluminum collars as supplied by the manufacturer.

These are steel front direct cups intended to increase rigidity in the drivetrain assembly once installed. When fitting these cups to a TRF421 chassis, the manufacturer lists compatible companion items: Item 51761 46mm Drive Shafts for Double Cardan Joint Shafts (2 pcs) (Ball Bearing Type) and Item 51762 Ball Bearing Set for Universal Shafts, which are recommended for full compatibility with the TRF421 configuration.

Fitment is limited to the specified chassis models; always verify part numbers against your build before installation. Use these components for maintenance, replacing worn drivetrain parts, or incremental tuning of drivetrain stiffness on RC touring car platforms.