This is the Yokomo B9-32UA19A upper bulkhead (A) made for BD9-family RC touring chassis. The part is supplied as 1 pcs and is intended for installation on the front-left position or the rear-right position depending on chassis layout and setup.
Fit this bulkhead when replacing a worn or broken upper mount or when altering suspension geometry during setup. It serves as the mounting point for suspension links and locates the upper arm relative to the chassis, so confirm left/right placement before fitting.
Before finalising installation, verify the chassis code and left/right location, tighten fasteners to spec, check link geometry through suspension travel, and validate on a static rig prior to track use.
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