Yokomo BD9 Stiff Plate Chassis Upgrade by Arrowmax AM-900004  [AM-900004]

Stiff chassis plate for the BD9 platform

The Arrowmax magnesium stiff plate is produced for the Yokomo BD9 1/10 touring car chassis. It concentrates on stiffening the chassis so suspension and balance changes yield more predictable on-track responses. Below we cover where to use the plate in a tuning routine, fitment checks, and the handling differences to expect.

Intended function and compatibility: the plate is designed for use with Yokomo BD9 cars and can serve as a direct replacement or an upgrade to the factory lower or upper chassis section depending on your model, helping to cut flex and enhance steering clarity. Installation guidance: the part uses the BD9's existing mounting points and hardware; move over stock screws and spacers and confirm correct alignment before final torque. Setup notes: more chassis stiffness typically results in snappier initial turn and steadier mid-corner grip, so tweak damping and swaybar settings to keep the car balanced.

Mounting compatibility

Made for the Yokomo BD9 series chassis; check your specific BD9 variant and mounting hole pattern to confirm a correct fit and orientation.

Straightforward and technically focused, the Arrowmax AM-900004 magnesium plate is a practical tuning upgrade for competitors seeking reduced chassis flex and improved repeatability on Yokomo BD9 touring cars.