A rubber grommet.  GoWesty has them for the purpose.  Probably you could find one that works at a hardware store, but the one from GoWesty exactly fits.  I think Bus Depot has them as well, as a part of the fuel line replacement kit.  DMc

---- "Mark L. Hineline" <hineline@OCOTILLOFIELD.NET> wrote:
> Zoltan, then how do you protect the fuel line from abrasion where it
> passes through the firewall?
>
> Mark
>
>
> On Oct 28, 2010, at 6:34 PM, Zolly wrote:
>
> > I eliminate this items when I install fuel lines.  It adds two more
> > connections to the system.  I connect straight to the plastic fuel
> > line.
> > This item is helping assembly at the factory only.
> > Zoltan

--
David McNeely