I believe this stuff is polypropylene rigid tubing. The dealer has it, you just need to ask for boost signal line. Probably expensive.

It is also available from Performance Analysis in Oak Ridge, TN along with door lock vac diaphrams, rebuild climate control units, etc.

You cannot use plain vac line because it is under pressure, not vac, and the expansion of the rubber hose would be a problem.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!