Yokomo SD-003M Drift Upper Deck Graphite Top Plate  [SD-003M]

Performance-focused upper deck for drift chassis

This SD-003M upper deck from Yokomo is a graphite upper plate intended for 1/10-scale drift RC use. It functions as the structural top member between the front and rear towers, affecting chassis torsion, roll response, and overall balance during drift setups. As an RC-scale accessory the part is described only in the context of model chassis tuning and replacement.

Fitting is aimed at builders familiar with basic chassis work: remove the stock plate fasteners, line up the SD-003M with the tower posts and bulkheads, then secure it using compatible screws. Verify the deck sits flush and that servo horns, ESC leads, and body mounts are not impeded. If required, alter screw lengths or use small shims to achieve correct clearance and proper thread engagement without over-torquing.

In practical tuning terms the graphite plate raises top-deck stiffness compared to flexible plastic plates, which tends to reduce unwanted chassis flex and deliver a more direct initial steering feel. Tuners use deck stiffness as a fine adjustment to influence weight transfer and mid-corner balance: increasing stiffness sharpens transitions while softer plates can smooth breakaway. Test changes incrementally to identify the best compromise for lock angle and throttle control.