is the large one feed or return? gonna hook them up right now ...

anyone?
Andy

If memory serves me right ......big one is feed !

Big one is feed on my car...

mine the large one too, but the lines that run through the tunnel are the same size. what's up with that?

Agree with large. Mine has both large and small through the tunnel. Step down occurs at the filter. Kinda defeats the purpose of the larger diameter unless the purpose was just to identify the two lines.