This BD-301FR part is an RC-scale front suspension arm mount designed for the rear side of the front suspension assembly, intended for use on Yokomo BD7 and BD5 touring-car chassis. The component is produced in blue anodized aluminum to provide a firm mounting point for the suspension arm pins without implying any real-vehicle application.
Functionally, the mount locates the outer end of the front suspension arm and forms part of the front suspension geometry. The left-to-right pitch between the suspension arm pins is 43.5mm, a critical dimension to verify during installation so the arm pins align correctly with the hub carriers and steering linkages.
Installation notes: confirm the 43.5mm pin pitch matches your chassis layout before fitting, re-use existing hardware where recommended by your chassis manual, and check for smooth articulation after tightening. In tuning, this mount affects roll center and track width relationships, so it is used when adjusting front-end response and steering feel on track or club runs.
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