I am pretty sure the hard lines have a double flare. I am just using pre flared auto part store lines. I am not sure how to explain it but the hose basically has the opposite flare. The hoses I bought from Speedway seem to work fine for the front, but everything they have is for "front" brakes. Those hoses for front brakes do not seem to be different from what I would need on the back. Is there a difference?