The 1jzgte valve cover ventilation hose is the hose that connects between both valve covers as part of the PCV system. This is a JDM only part that can be difficult to source in the states. These are high-quality OEM Toyota hoses that properly seal the valve covers. We always replace these on our JDM swapped engines to prevent oil from leaking down into the spark plugs valleys. Our price is for one hose and these work on both twin-turbo and VVTi variants of the 1jzgte.