Featuring a raised rib design, this cast aluminum 'second skin' cam cover trim fits over your OEM cam cover. It is held in place with three supplied Allen bolts and spacers. The EMD cam cover trim can be notched at the upper front to make room for your OEM breather. You can also opt to relocate the breather to a lower position, especially if you're cutting the OEM cam cover up to visually 'split' the motor from the transmission. These covers are available in two styles, the classic ribster and the knuckle style with raised ribs and a smooth front section.