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Speedometer is off by 5-8mph

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Old Nov 16, 2020 | 08:13 AM
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Default Speedometer is off by 5-8mph
I guess I forgot that running different tire size would cause this so I need to adjust it. Is there an electrical device out that that can do this? I would like to intercept the signal before it gets split to the ecu/cluster/cc module.

Edit: right, forgot.

00 Sedan 'd15b' 5spd.
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Old Nov 16, 2020 | 08:29 AM
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Default Re: Speedometer is off by 5-8mph
Found my answer

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Official home page of the Yellow Box Speedo Recalibrator
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Old Nov 16, 2020 | 02:58 PM
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Default Re: Speedometer is off by 5-8mph
Here's another option

https://www.healtech-electronics.com/products/sh/
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Old Nov 16, 2020 | 04:35 PM
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Default Re: Speedometer is off by 5-8mph
These Aussies make a harness 'for your car'. Plug and play baby. I requested a 3m run.
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