These Proform Ford Racing Licensed slant edge valve covers are designed to fit directly on your engine with no modifications. They are manufactured from cast aluminum and are available in different finishes to customize the look of your engine bay. The valve covers feature a tall design, so they will clear roller rocker arms and polylock nuts. Proform Ford Racing Licensed slant edge valve covers have raised and milled emblems for a truly unique look and include baffles and grommets.