The 3Racing Sakura Advance 20M Big Bore Damper Foam SAK-U314D is engineered to improve damping consistency under lap load. Designed to interface with SAK-U314/PK style damper internals, the insert helps control fluid migration and stabilise response during transitions.
Developed for competitive tuning, the Big Bore Damper Foam reduces high frequency noise and smooths compression peaks, allowing finer adjustments to oil weight and spring rate without unpredictable damping behaviour.
The insert is profiled to seat cleanly inside Sakura Advance 20M shock bodies, limiting internal play and promoting repeatable movement. A secure fit helps maintain setup settings across runs and supports consistent chassis balance.