| This listing is for the hose that runs from the valve cover to the throttle body. It fits all 78-80 z's and it also fits the 77 z's with a production of 5/77 or newer. This hose is the return line for the PCV system and it's very important that it seals tightly on all injected z's. It is imperative that you use the correct hose for this application. DO NOT USE HOSE DESIGNED FOR COOLING SYSTSEMS ON ANY INTAKE MANIFOLD FOR VENTING. The hose must be rated for use with gas and oil and it also has a flame arrestor inside of it. This hose is temporarily a special order only item. Please allow an extra week for delivery. Last update 04/11 | 
