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My understanding of the air regulator is that it's calibrated to each engine which is why it's got a different part number for almost every application despite looking the same.
That said the way it works is, there's a bimetal strip, when the engine is cold the valve is open, as the engine warms up the ECU turns on a heater inside it which closes the valve.
You could probably get one from a different engine and it would probably work "OK". Your cold start idle speed might be a bit high or low. I can't say for sure what the effect would be.
I'd try to find one for an SR20DE/DET, that one is discontinued new from Nissan but was cheaper than the Skyline ones when I could find it. It came in a ton of US spec cars too like G20s and Sentras. 22660-93L00
Beyond that I would bet the R32 one is closest since it was used for both the R32 RB20 and RB26. 22660-01U10
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03-12-2025, 03:01 PM
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