Yokomo B9-501MCAA Spool drive cup for BD9 橫崛  [B9-501MCAA]

This really is an aluminum drive glass well suited for the particular key spool of BD9. Its lighter than standard steel, that's effective in increasing throttle impact.

Supported Chassis
MSR-010 / MSR-010A / MRTC-BD919 / MRTC-BD919S / MRTC-BD10 / MRTC-BD10A / MRTC-BD10LC / MRTC-BD10LCA / MRTC-BD10LCR / MRTC-BD10LCRA / MRTC-BD11-1 / MSR-BD11 / MRTC-BD11US / MRTC-BD11A-1 / MSR-010FE / MSR-010FEA / MSR-BD12 / MSR-BD12A