This blue aluminum rear suspension mount is designed for the front-side position in MR-4TC BD style on-road rear layouts. As a separate replacement component, it replaces the factory front-side mount to provide a stronger, more consistent mounting surface than typical plastic parts.
The BD-300MRF reduces flex at the swing arm attachment, helping to maintain rear geometry and influence traction and handling balance. Install it at the front-side rear suspension interface and verify that alignment and clearances are correct prior to operation.
Intended for hobbyists seeking metal replacements for repeatable setups, this part is compatible with MR-4TC BD style rear configurations and supports refined on-road tuning choices such as roll center and rear-end feel.
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