Originally Posted by mbumpus11

I definitely don't get to -20F in Texas, but we get blazing hot in the summers. The ARB Kit hose is fine for a little bit, but mine made contact with my exhaust manifold and it absolutely melted immediately (which makes sense).

I replaced it with some thicker clear hosing I found at the hardware store, and it had some pretty aggressive temperature capabilities from what I recall. I have driven and spent plenty of time in Kansas when at/just below 0F, but never as deep cold as you're talking. Still...would definitely be a proponent of swapping the standard ARB kit hose with new hose. I believe I have pics from my hose swap in my threads somewhere. Will look.

EDIT*** for @HumbleLeader - Link to my swap/re-install where you can see the type of hosing I bought: https://www.toyota-4runner.org/3314251-post227.html