Fuente: WIPO "rice" The receiver rail is the key part of the invention and is new to any fastener design in Drag Racing oil pans. It holds the oil pan firmly in place on the left side of the adapter rail. The oil pan is easily slid into the receiver rail at a slight angle. When it is pushed against the inside edge of the receiver rail the pan is raised up into place and seals completely against the o-rings around the pan flange. The four ¼ turn fasteners are snapped into place on the right side and installation is complete. This eliminates the need for any bolts.