This differential cover is constructed from high-strength A356 cast aluminum and features machined fins for maximum strength and styling. Increased oil capacity of approximately 0.5 quart over stock for better performance over a longer duration. Built-in internal and external fins transfer heat from the oil to the outside air for maximum cooling. Incorporates a magnetic drain plug to capture loose particles for maximum protection. Includes a precisely positioned oil-level plug that automatically prevents overfilling as well as eliminating guesswork and ensuring your axle is serviced correctly every time. Comes complete with high-quality stainless-steel hardware for durable, corrosion-resistant, and hassle-free installation. Optional PRO Series deep-reach magnetic fill plug (PN: 46-00003) and oil level sight glass (PN: 46-00001) is a great addition to combine with this cover.