A bit of ribbed metal (brass?) tubing connects the hot air intake diaphragm to the manifold. It is about 1 13/16 OD, 2 inches long. It is just a little bit flexible. AutoZone and Pep Boys tell me they don’t have it, or anything suitable. The parts guy at the Toyota dealership tells me that it’s no longer in Toyota’s inventory; he called it a hot air riser and told me some hot rods used it to be street legal. The 1 hot rod shop I know didn’t know what he was talking about. I couldn’t find anything suitable at True Value hardware.
It’s not a precision part; it doesn’t seal. I bit of 2-inch OD tubing that would fit around it could do the job. It has to tolerate engine temperature. Possibly some part made for the exhaust system?