This part is the standard graphite upper deck designed for the YZ-4 4WD off-road scale car, supplied under Yokomo part number Z4-003. As a top-plate replacement, it serves as a tuning piece to alter the chassis’ top-side stiffness and behaviour without changing other suspension or drivetrain components.
Constructed from graphite, the deck is intended for RC-scale tuning: riders use it to influence chassis flex, turn-in and mid-corner balance. Because the item is a dedicated accessory for the YZ-4 platform, confirm that your chassis variant matches the supported listing before fitting.
Installation notes: this upper deck installs to the chassis using the vehicle’s existing upper-deck mounting interfaces. When fitting, verify alignment with the B-YZ4 mounting points and reuse or confirm hardware as supplied by the seller, and perform incremental setup checks to judge handling changes.
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