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4.5 inch coupler on 112mm TB?

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Old Oct 23, 2022 | 11:34 AM
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Question 4.5 inch coupler on 112mm TB?

Does anyone know if a 4.5 inch coupler will work on a 112mm NW Throttle Body? Asking cos I have not received my TB yet but I can get a 4.5 inch angled coupler for free basically...
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Old Oct 23, 2022 | 12:53 PM
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112mm is 4.41 inches, and that's the ID of the TB.
Add the wall thickness x 2 and you have the OD, which shoud be a bit more than the ID of any coupler used.
Sounds like it MIGHT fit, though it will be stretched a bit
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Old Oct 27, 2022 | 10:43 PM
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I know a 4.75" coupler fits great. If that coupler has enough give, it may stretch enough.
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Old Oct 29, 2022 | 10:08 AM
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FYI, a 4.5 coupler does fit with a little effort. I used a Vibrant coupler btw.
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