Features:

High tensile solid nodular iron structure (tougher and harder than solid carbon steel) protects the differential and ring & pinion set from the obstacle impact hazards of completion rock crawling, or extreme off road trails.
Computer optimized cross brace design adds more than 1300 Nm/deg [960 ft-lb] of torsional rigidity to the entire axle assembly. This increased flexural strength in the housing helps keep the ring & pinion gears meshing on the flat faces of the teeth, which greatly increases ring & pinion life and overall maximum load strength.
Carrier bearing life is prolonged, especially on high output vehicles, by the improved support given to the bearing alignment.
Low-profile shape of the outside surface helps maximize the running gear clearance around the cover.
Maximized approach / departure angled exterior surfaces help to minimize rock / obstacle hang-ups.
High tensile cap screws (supplied with the kit) are recessed into the cover to protect them from contact with obstacles which might damage or loosen them.
Low profile drain plug design resists damage from obstacle contact.