crddriver wrote:
High pressure lines.
Are you sure? The rail is the cast aluminum piece (about an inch in diameter) with hard steel lines connecting to the side of the injectors. These are metal pieces because the rail reachs pressures of 28,000 PSI.
The plastic tubing that comes off the top of the injectors are the return-to-tank lines. They join up with the rail pressure solenoid return at a plastic junction bolted to the side of the head, then head back to the tank. This is all relatively low pressure and plastic does the job just fine, IMO. It's certianly easier to break (of course, as you have found) so I could understand wanting to replace them from that standpoint.
I remember seeing a post from someone that broke the plastic junction and replaced it with something homemade of brass fittings, etc. If you can find the post, that would be a good place to start.