The Tamiya #9803481 Lower Bulkhead is a genuine replacement part for the TRF421 chassis that restores factory geometry and helps keep handling consistent. It is aimed at modellers who service their cars regularly.
By supporting suspension mounting points, this lower bulkhead contributes to steady handling and improved driver feedback on technical track layouts. The design reduces unwanted movement under load.
Whether fitting a fresh replacement or using it as part of a setup change, the Tamiya #9803481 Lower Bulkhead is compatible with TRF421 layouts and supports common tuning adjustments.
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