I am sorry I posted all that jazz about Viton. I thought you were referring to clear plastic hose added by someone to see if air bubbles are in the fuel supply line, that being the hose that carries fuel to the IP. (Yes, its a WVO thing).

Now after revisiting this thread I believe what you are looking at is the rigid plastic lines with factory installed banjo (metal) fittings on the ends. These aren't going to fail. They turn dark from fuel attacking the plastic or some kind of chemical change, put new ones if you are making a show car O/W I wouldn't waste any time or $$ on them! Sleep well and don't worry about them!

If however you are set on replacing them, buy the complete lines at the dealer, its VERY difficult to install the banjo fitting on that rigid hose, you need special clamps (ok make them out of hard wood if you really want to DIY) and finding the rigid plastic is going to be nearly impossible.

Call Phil re: the rest of the bulk black rubber hose. Forget Viton! Go to a dealer if you need it tomorrow morning.

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!