Edelbrock 4406 Billet Aluminum Oil Filler Cap

The Edelbrock Oil Filler Cap is machined from 6061 T6 billet aluminum and then polished to a brilliant finish. This push-in style oil fill cap covers an opening into the valve cover and allows you to add oil when indicated by the dipstick. Oil, which is added through the filler, passes down through openings in the head into the oil sump at the bottom of the engine. It is shaped like a domed piston.