The 3Racing SAK-M4P19 Graphite Chassis Stiffener is built to increase chassis rigidity on the Sakura M4 Pro, helping preserve setup geometry under load. Made from stiff graphite material, it improves the chassis platform for sharper control and lap to lap consistency.
Graphite brings stiffness with minimal mass, reducing unwanted flex that can blur steering feedback. The stiffener helps the car respond more accurately to setup changes and driver input.
Drivers focused on consistent performance will find this upgrade useful for fine tuning. It supports better repeatability in cornering and makes suspension adjustments more effective.
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