This is a graphite rear upper deck plate created for the Tamiya F103GT chassis, listed as F103GT-21/SG. It is an aftermarket hop-up aimed at altering rear torsional stiffness to influence handling and overall balance on 1/10 GT tracks.
The part replaces the stock rear upper deck using the existing F103GT mounting locations, so installation stays simple with standard screws. Graphite's greater rigidity versus typical plastic helps limit flex under cornering loads while preserving a low mass suitable for performance RC cars.
Fit this plate when you want to pursue chassis tuning through structural changes rather than suspension swaps. You should notice adjustments to rear grip and transient feel as chassis stiffness shifts load behaviour during turns and acceleration.
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