FWIW, the illustration for the tripower in the MPC says the PVC lines are 9/32" from intake to F connector and 21/64" from F connector to PCV valve.
The fuel hose is 21/64" from pump to filter and fuel pipe to filter.
In all cases, I believe they mean ID of hose, although only the hose from F connector to PCV valve actually shows "ID" in the description.
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