Tamiya TRF421X Rear Split Upper Deck Lite Graphite 1.6mm - Upgrade O-TCP012S by Factory Pro  [FP-O-TCP012S]

TRF421X Rear Split Deck Upgrade

This aftermarket rear split upper deck is made specifically for the Tamiya TRF421X touring car platform and is supplied as a lightweight graphite plate with a nominal 1.6mm thickness. Fitted as a hop-up component, it alters how the rear section of the upper deck couples to the chassis so you can make measured changes to local flex and balance while keeping the stock mounting geometry unchanged.

Fitment uses the vehicle's original upper deck mounting points and the chassis' existing fasteners. Inspect mating surfaces for clearance and alignment before final torque. The split in this deck changes how loads travel through the rear assembly; small fit differences or shimming will produce noticeable changes in on-track behavior.

Use this part as a chassis-setup item: swap it with the stock deck to compare behaviour, or run it alongside other deck thicknesses and rear components to dial rear grip, rotation, and transient response. This item is intended for RC-scale TRF421X kits and is a setup component rather than a generic body or structural substitute.