I used gas tank filler hose 1-5/8" SUPER thick rubber, with cloth reinforcement. very good stuff.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Older thread, newer bump. Noticed I needed one of these after performing a diesel purge. I opted to get a 4 ply straight silicon hose, with stainless steel braid reinforcement, like the kind used for turbo intercoolers. They are sold on eBay for cheap, and come pre-cut to about 3 inches in length, which you can cut down to 2" using an angle grinder or pipe cutter.

Anyway thanks to all those providing info on this thread

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Sev,
Thanks for posting this. I also was going to suggest silicone hose. I used that on my 64 Valiant slant six engine for its short bypass hose (5/8"D), and the silicone let me easily work it into that small gap, plus should last forever. I used much larger silicone hose (2.5"D?) for the turbo inlet on my 1985 CA 300D. Same on my 1984 300D, installing a 1985 CA frame-mounted air cleaner. It comes blue & red, if you want a purty engine. It cuts easy w/ a cheap razor knife.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

Red Alert! Two weeks ago I started to replace my by-pass hose. After twisting off both bolts (and I was gentle) I still don't have my car running. Use caution removing the bolts, there isn't enough penetrating fluid on the planet to dissolve the oxidation and crud. I might add if the bolts don't break free immediately, re-think it. I wish I would have left it alone.

I did that on mine. One bolt you can thru-drill and sneak a nut on the bottom - problem solved forever. The other one I carefully drilled out and did a Heli-Coil (or similar) and saved the housing. 6mm IIRC. It was worth pulling the housing as it allowed me to clean it up on the rotary wire brush (think bench grinder) and get a clean surface under the hose.

I used the 1 5/8 gas hose and it fit's PERFECTLY. I suspect it's what they used from the factory except it's readily available. I cut mine with a hacksaw - works fine. I'm sure the silicone would work fine too but be REALLY careful that you don't cut it with the clamp - easy to do on silicone (voice of experience).

Dan