The Yokomo Z4-003S High-Flex Upper Deck (CG) is an aftermarket-style replacement for the YZ-4 4WD off-road car's upper deck position. Fabricated from graphite with a central slit, the deck raises chassis compliance compared with the factory upper deck and promotes more manageable handling.
The central slit localises bending so roll and weight transfer occur in a more progressive manner. This effect improves stability when cornering and when running over bumps or loose surfaces, making the deck a practical tuning item for varied track conditions.
Installation notes: fit in the YZ-4 upper deck location and ensure the mounting points are aligned during assembly. After installation, make incremental adjustments to suspension and weight setup to harmonise with the increased flex.
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