This Factory Pro front split upper deck is a graphite 1.6mm replacement made specifically for the Tamiya TRF421X chassis, offered as an RC hop-up that matches the stock mounting pattern. It acts as the front half of a split upper deck layout so builders can swap front deck material or thickness while leaving the center and rear unaffected.
In tuning terms the 1.6mm graphite panel changes front chassis stiffness and response when compared to the OEM plastic deck, producing an expected alteration in front-end handling. Fit the plate using the TRF421X's original screws and hardware and check for proper alignment and clearance around the servo, steering linkage and front suspension prior to operation.
Note that fitment is specific to the TRF421X split upper deck format; confirm your chassis layout before removing the stock front deck. As with any carbon/graphite component, inspect mating surfaces for sharp edges and adhere to the chassis manufacturer's fastener torque guidance to avoid stress concentrations.
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