I replaced mine with a piece of gas line (new, not used) that I had laying around. The old line was slowly turning to powder and had a 3 inch long slit along it. Was getting sporadic codes indicating left or right bank lean condition (P0171 & 0174??) and one indicating evap control could not be completed. It slipped on to the connectors at the valve and the manifold tightly. Don't remember what size it was (5/16??), and could reuse the connectors.