That line actually registers boost.

It is my thinking that the engineers made the line hard so that the signal would not be delayed and be "immediate". If you use a soft hose, the hose will expand and the associated signal would be lost or not as strong (theoretically).

If it snapped off right at the Banjo Bolt, you could use some JB Weld "quick" to get you buy until you find a piece of the hard line. I imagine you could use any rigid line as long as it is a good fit and is the right "ID", heat resistant, etc...

__________________
AJ

1985 300D (SOLD)