E46 Finned Differential Cover

The E46 Finned Differential Cover installs on all E46 323, 325, 328, and 330 differential housings. If you have a custom limited-slip differential, you need this diff cover to protect your investment! 

During even short track sessions, the friction from the clutches and gears in your limited-slip differential heat up the fluid to a critical level - this is the reason you'll often see fluid seeping out of the vent hole after hard use. The massive cooling fins on this cover help to keep temperatures under control, which will increase differential life and avoid costly failure.

Uses all of the original hardware except the bolt below the mount. A new longer bolt (M10x60mm, BMW part number 07119905148) is required which you can find from the Related Items below.