Polished Billet Aluminum Banshee Cool Head. One Piece Design Allows for Maximum Cooling without having to replace the stock studs. Modquad Cool Heads have one of the largest water cavities produced. They hold up to 35% more water than any others. The new one-piece design has an open flow between chambers to equalize water pressure and increase water circulation for improved cooling, added protection and horsepower. The head uses stock studs that do not have to be changed. The Modquad head comes complete with copper washers, acorn nuts and O-Rings.