Black MAX Shock Absorber 88-98 Chevy/GMC K Series Trucks w/Black Boot 22.58 Inch Extended 13.92 Inch Collapsed SkyjackerBlack Max twin tube shock absorbers have increased fluid capacity and utilize foam cell technology. When the shock is working hard and gets hot, the foam cell insert compresses to compensate for oil expansion which maintains consistent Max performance throughout the operating temperature range of the shock. The foam cell design also eliminates air inside the shock which allows for mounting in any direction. Arc welded end mounts and select specific