Most OEM stock lines will be fine, however most aftermarket shops use line that will not be ok when running new fuel lines (most shops use braided, which sucks for regular fuel, not to mention E85). I’m assuming that the car in question has additional fuel lines ran that are not E85 compatable. A friend and I researched this subject for days, and the most readily available (not to mention cheapest) E85 compatible line on the market is Aeroquip pushloc, available from Jegs. I’m too lazy to get the specific name of the line, but jegs only has one kind of line available from Aeroquip and it’s the correct one to use.