Mike - When I did my F-1s I had a leaker. Apparently I tightened the one too much. I was able to loosen then "snug" back up to stop the leak. I've heard that if you overtighten the line nuts too much you may end up replacing the entire line - not sure why? Maybe the line cracks??? Try loosening one, then snug it (not tighten until it stops) then check it for a leak. Then try the next one - do one at a time. Hope this works for you. Did you do the HRVP-44 or stock?