The BD-301FR3 is a blue anodized aluminum front suspension arm mount for 1/10 touring car chassis BD7 and BD5. It replaces the rear side of the front suspension arm mount to alter arm pin spacing and change front-end geometry while leaving other suspension parts intact.
The measured pin pitch between left and right suspension arm pins is 44.2mm, which is 0.7mm wider than standard. That modest increase changes track and scrub radius and can be used to fine tune front behaviour and cornering balance.
Installation notes: attach at the original suspension arm mounting points with the existing pins and hardware, ensure alignment before final tightening, and proceed with incremental tests - slight spacing changes may need corresponding toe or camber tuning to restore handling balance.
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