The 3Racing Graphite Upper Deck SAK-A578SO is engineered to increase upper chassis stiffness on the Sakura Advance 21, reducing undesirable twist under lateral loads. By firming the chassis, the deck improves steering precision and allows finer adjustment of suspension and anti-roll settings during setup work.
Graphite offers a low weight solution that raises torsional rigidity without significantly adding mass. This change alters the chassis response curve, enabling more consistent weight transfer and better predictability when adjusting camber, toe or roll distribution.
The 3Racing Graphite Upper Deck installs to the stock Sakura Advance 21 mounting points and is compatible with common upgrade components. For competitive tuning, fit the deck and then re-evaluate damper valving and sway bar rates to optimise front to rear balance.