The key difference is where the main restriction actually comes from. With something like the Charger 3, the flow path leading to the shim stack is restricted, so that restriction effectively sits in series with the shim stack. With the ZETA Tune Adjuster, the ports and the fluid paths leading to them are sized so that the shim stack itself...
First up, thank you to the Vital team for presenting our product here! Since a few questions came up, I wanted to chime in and clarify a bit what we mean by the Tune Adjusters. As @Slavid666 analyzed pretty much spot-on, the High-Speed Tune Adjuster changes the port configuration underneath a non-preloaded tapered shim stack. With each adjuster position, one...