If you decide to pass the fuel lines through the stainless steel firewall, which
is what I did initially 20 years ago, mark a square or a rectangle on the sheet
just big enough for the hose line/s to pass through. Make 2 diagonal cuts
---From corner to corner within the rectangle to form an 'X', then fold the 4
points
at the 'X' intersection back on themselves to lie against the sheet. This
will leave the edges smoothly rounded and not able to chafe the hose/s. Fill in
the gaps around and between the hoses with flame retardant silicone.
You should also secure the hose/s on one or both sides of the sheet to prevent
them sliding back and forth through the opening.
In later years I covered the rectangular hole and rerouted the two hoses via
gaps
at the top left and right corners of the stainless sheet.
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