Tamiya TRF421 Split Rear Upper Deck - Factory Pro O-TCP005 Graphite 2mm  [FP-O-TCP005]

Split Rear Upper Deck for Better Chassis Control

The Factory Pro split rear upper deck is an aftermarket option tailored for the Tamiya TRF421 chassis. Produced from 2mm graphite, the plate replaces the original rear upper deck to alter stiffness and integrate with the TRF421 mounting pattern.

Fitting is straightforward for anyone experienced with TRF421 service: remove the stock rear upper plate, align the split graphite component with the original screw holes, and refit using the stock fixings. No cutting or chassis alteration is required when installed correctly.

This piece is intended as a setup adjustment tool. Switching to a harder graphite rear upper deck modifies how the chassis resists flex during acceleration and cornering, so expect to make incremental changes to dampers, roll bar balance, and toe to reach the desired handling feel.