Yokomo B12-003RS Rear upper deck graphite for MSR-BD12 / MSR-BD12A  [B12-003RS]

Rear upper deck for MSR-BD12

This rear upper deck is a graphite replacement part intended for the MSR-BD12 series chassis. The plate is produced to be 1.5mm thinner than the standard deck, which reduces local chassis stiffness and shifts handling toward milder, more progressive steering.

Fitment is specific to the MSR-BD12 and MSR-BD12A chassis; installation replaces the existing rear upper deck and requires standard assembly steps used for this platform. The part is intended as a tuning option to fine-tune mid-corner balance rather than a primary stiffness upgrade.

Designers and tuners use thinner graphite decks like this to moderate oversteer and soften transient responses, helping drivers achieve a more predictable steering feel without other major setup changes.

As a subtle tuning component, this graphite rear upper deck offers a straightforward way to soften rear-end rigidity and refine steering balance on MSR-BD12 platforms without altering major suspension components.