The 3Racing SAK-M4P19 Graphite Chassis Stiffener fits the Sakura M4 Pro and increases structural rigidity for more consistent behaviour. Manufactured in durable graphite, it helps the chassis resist deformation during hard cornering and rough sections.
Graphite is stiff yet light, which means the chassis gains strength without a heavy penalty. By cutting down flex, the stiffener supports better weight distribution and more predictable responses from the suspension.
When you need repeatable lap times, this upgrade keeps the chassis stable under load and enhances feedback through the steering chain. It is a straightforward tune for racers refining setup.
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