This BBC heavy duty extra deep Marine oil pan is for Mark V style Big Blocks with 1 piece rear seal and is designed for offshore racing. The 10" deep, 14" long sump holds 10 quarts of oil. In addition, double trap door baffles and a bolt in windage tray are featured to prevent oil slosh from the motion of the boat. The pan also includes a 1/2" N.P.T. fitting on each side for oil drain and a provision for our pan mounted dipstick. This pan requires our 18-381 pickup.