2006 and earlier GSX-R1000 models had the oil pressure relief valve sandwiched between the engine block and the oil pan. In 2007 Suzuki moved the valve to a new housing closer to the center of the oil pan, connected by a passageway to the original location. In the original location they replaced the valve with a simple cylindrical connector gizmo with o-rings at each end so that oil would still flow to the new valve location. This gizmo is popped out by hand and discarded, and the oil pressure relief valve is flipped top for bottom and inserted in its place. This should become clearer in the photos below.