Fox 2025+ Toyota 4Runner / 2024+ LandCruiser GX550 3.2 Factory Race Front Shock - 1-3in LiftDSC EVO features Variable Valve Control (VVC) on the high speed circuit. Unlike most compression adjusters that rely on adding preload, VVC adjusts leverage to isolate high speed from low speed damping precisely. The result is more comfort, independent high and low speed circuits, and increased capacity for big hits. Add clicks of high speed compression without sacrificing small bump sensitivity.