The BD-301FR3 is a blue anodized aluminum front suspension arm mount for 1/10 scale touring car chassis BD7 and BD5. It replaces the rear section of the front suspension arm mount to change arm pin spacing and influence front-end geometry while leaving other suspension components unchanged.
Measured pitch between the left and right suspension arm pins is 44.2mm, which is 0.7mm wider than the standard spacing. That small increase alters track width and scrub radius, so apply it when you need a subtle shift in front-end behaviour for setup and cornering balance.
Installation notes: fit to the original suspension arm mounting points using the existing pins and hardware, check alignment before final tightening, and test in small steps - small changes to arm spacing may require matching toe or camber adjustments to restore balance.
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