Yokomo SD-003M Upper Deck — Graphite upper deck for drift RC chassis  [SD-003M]

Drift upper deck for chassis tuning

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.

Installation is straightforward for experienced hobbyists: remove the stock upper deck fasteners, compare mounting hole alignment and tower clearances, then secure the SD-003M with the original hardware if compatible. When fitting, check that the deck sits flush with the bulkheads and that no interference with servo linkages, ESC leads, or body mounts occurs. Small spacers or adjusted screw lengths may be required on some setups, so verify clearance before final tightening.

In tuning terms the graphite plate increases top-deck rigidity compared with thin plastic decks, which tends to reduce chassis flex and sharpen initial turn-in for drift lines. Hobbyists use changes to the upper deck material and thickness as a predictable lever: stiffer decks move load between chassis centre and ends, while more flexible decks soften transitions and can help manage traction break. Use on-track testing and incremental adjustments to find the preferred balance for lock angle and throttle modulation.