Upgrading to the Tamiya 3404156 lower deck sharpens the TRF421 chassis response for drivers chasing better control. The component is engineered to reduce flex and keep suspension geometry stable when pushing through technical sections.
With a firmer base, the car tracks more predictably and recovers quicker out of corners. The lower deck helps preserve tuning choices run after run, making setup work more effective for both practice and racing.
Built from high-grade material, the Tamiya 3404156 stands up to frequent running and typical wear. It is compatible with the TRF421 chassis and aims to offer a reliable upgrade that minimises downtime between sessions.
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