The Yokomo Z4-003S High-Flex Upper Deck (CG) is a replacement upper deck designed for the YZ-4 4WD off-road car. Produced in graphite with a central slit, the part delivers increased chassis flex versus the original upper deck to create more controlled handling responses.
The central slit channels bending into the deck so weight transfer and chassis roll develop more smoothly. That change supports greater stability through turns and while negotiating uneven sections, making this deck a practical tuning choice for degraded or loose surfaces.
Installation notes: intended for the YZ-4 upper deck position — align mounting points carefully when fitting. As with any change, evaluate handling incrementally and retune suspension or balance settings to suit the added flex.
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