Strange Engineering 8.8 Aluminum Differential Cover. The support cover features two premium grade load bolts; providing main cap support. The additional support of the case main caps dramatically reduces ring gear deflection, stabilizes gear backlash, and diminishes the chance of cap breakage or distortion. The Ultimate cover features two tapped holes. Which will accept the optional LPW brace kit. Ultra-Pro covers are slightly lighter and are not machined to accept the brace kit. Each girdle is supplied with mounting bolts, filler plug, drain plug.