IFP Prevents Gas\Oil From Mixing Or Foaming,ADX 2.0 Has Large 46mm/1.811 in. Bore Size,Factory Set/Vehicle Specific Full Displaced Valve System,Provides Better Performance/Cooler Running/More Control,From Higher Speeds To A Crawl/Skyjacker ADX 2.0 Works,Constant Controlled Resistance Prevents Lag And Fade,ADX 2.0 Teflon Banded Piston True Reaction Adds Stability,ADX 2.0 Reacts Quicker To Improve Handling And Stability,Aggressive Look/Unparalleled Performance/Impressive Ride,ADX 2.0 Aluminum Monotube Provides Better Heat Dissipation,Delivers Consistent Dampening/Superior Ride Performance,IFP Technology Provides Quickest Shock Reaction Time Ever