This is an option upper deck intended for Tamiya TRF421 scale racing chassis. The part is a 2mm graphite plate designed to replace or upgrade the stock upper deck and mount to the TRF421 upper-deck locations.
The component is used as a tuning element to change chassis flex and front/rear balance. Fitting the graphite deck increases local stiffness compared with softer stock plates, shifting handling characteristics in predictable ways that can be used when developing setup changes.
Installation uses the existing upper-deck mounting geometry on TRF421 chassis; it aligns with stock mounting points and fasteners on that platform. When fitting, verify screw engagement and clearances around servo, battery, and suspension components before final assembly.
Use this 2mm graphite upper deck as a straightforward tuning option on TRF421 cars to refine chassis stiffness and handling balance without altering suspension geometry.
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