For club racers and weekend tuners, the 3Racing Graphite Upper Deck SAK-A578SO is a straightforward upgrade to firm up the Sakura Advance 21 chassis. The graphite panel reduces flex and helps the car react more cleanly to steering inputs and setup adjustments.
Graphite offers a lightweight way to stiffen the chassis, helping the suspension and tyres do their job more consistently. The result is improved turn-in, steadier mid-corner balance, and a more confidence-inspiring feel on mixed surfaces.
The 3Racing Graphite Upper Deck fits the Sakura Advance 21 using standard mount points and is easy to swap in during a weekend build. It works well with common upgrade paths and allows fine tuning of chassis behaviour without complex modification.
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