Rear Performance Series 2.0 Smooth Body Shock99-ON Chevy HD PS, 2.0, IFP, 9.6" 0-1" Lift PERFORMANCE TUNED FOR VEHICLE SPECIFIC APPLICATIONALUMINUM BODY DISSIPATES HEAT FASTER THAN STEELIFP SEPARATES OIL FROM HIGH-PRESSURE NITROGEN GASBLACK ANODIZED CNC MACHINED ALUMINUM COMPONENTS