Turbosmart’s Patent Pending OPR T40 is an Oil Pressure Regulator designed for your Turbocharger.Turbosmart’s OPR T40 is a true regulator in that target oil pressure oil 40psi can be achieved without compromising oil flow. This takes the guess work out of restrictor, or feed and drain hose selection and ensure the oil going to the turbocharger, never exceeds the manufacturers tolerances – This will provide you rock solid oil supply pressure, within the manufactures tolerances.