I've purchased all the necessary stuff to replace all the fuel lines in my '85 Regal 454, but have a question. On both supply lines, one from the rear tank and one from the mid tank, I have fuel filters. But on the RETURN line to the rear tank, there is also what looks like a fuel filter. I mean, this thing looks exactly like a fuel filter. But why would there be a fuel filter on a return line??
Thanks all,
Jim

Maybe a check valve?