Black 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 valving give the BlackMAX shock absorber MAX value. Product Features:Advanced Foam Cell TechnologyVehicle Specific Multi Stage ValvingIncreased Fluid Capacity And Advanced Foam Cell For MAX Heat Dissipation And MAX Fade ReductionTwin Tube ConstructionChrome Plated Shaft360 Degree Arc Welded End Mount180 Degree Directional MountingSintered Iron PistonHeavy Duty Compression Head Reliable Performance Under Extreme ConditionsLimited Lifetime Warranty