The 3Racing Sakura Advance 4mm Universal Shaft Cushion (SAK-U122D-V2) is engineered to mitigate wear points on the universal shaft assembly and maintain consistent driveline feedback. As a direct service item for the Sakura Advance series, it supports repeatable performance by reducing abrasive contact that can alter shaft dynamics. Use it as part of a scheduled parts refresh to keep lap times consistent and reduce mid-session component swaps.