MSR-BD12 / MSR-BD12A Graphite Rear Upper Deck B12-003RS - Yokomo  [B12-003RS]

MSR-BD12 Rear Upper Deck Overview

This graphite rear upper deck is a direct replacement for MSR-BD12-series chassis. Manufactured to be 1.5mm thinner than the standard deck, the plate reduces local stiffness at the rear of the chassis to soften transient reactions and promote a more progressive steering feel.

Fitment is specific to the MSR-BD12 and MSR-BD12A layouts; installation involves swapping the existing rear upper deck using the same assembly points as the original component. This item is intended as a fine-tuning option to adjust mid-corner balance rather than as a primary stiffening upgrade.

Tuners commonly use thinner graphite decks like this to tame oversteer and smooth abrupt steering inputs, delivering a more predictable rear-end behavior without changing major suspension parts.

As a subtle tuning component, this graphite rear upper deck provides an easy way to soften rear-end rigidity and refine steering balance on MSR-BD12 platforms without changing major suspension geometry.