How you plan on connecting the billet ends to the full rail ?
You'll need a billet fuel rail or cut and weld some fittings to your OEM fuel rail. (or use some of those fake covers over a jubilee clip)
You can get some special fittings to adapt from the OEM quick connectors (Bundy Fittings) of the original lines to AN fittings.
Check out this thread which shows them -
http://forums.vwvortex.com/showthread.php?4946130-REFERENCE-1.8t-Fuel-Lines-Fueling-FAQ