The Tamiya #9803481 Lower Bulkhead is intended to replace worn or damaged parts on the TRF421 chassis and restore factory alignment for dependable track performance. It is a straightforward spare for racers and regular club drivers.
This bulkhead gives solid support for suspension pivots and keeps components aligned under stress. Its robust build helps reduce chassis flex and contributes to a sharper steering feel.
Swap in the Tamiya #9803481 Lower Bulkhead during scheduled service or when upgrading suspension parts; it mates cleanly with standard TRF421 components to simplify setup work.
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