Corrects a high-reading speedometer, whether factory error or after changing the differential. This module has been specifically designed for the S2000 and allows you to compensate for an erroneously high speedometer/odometer reading. There are several reasons you would want to do this:
Installation requires wiring the electronic module into the speed signal circuit, usually behind the driver's foot well panel. An optional connector kit is available that includes crimp terminals typically used for the installation as well as a 4-point barrier block for wire terminations if you don't have a crimp tool.
Note - This device cannot be used to compensate for erroneously low speedometer readings. It ONLY adjusts the speedometer to read lower than it does now. If your speedometer currently reads too low, this product will not adjust it higher. If your speedometer reads too high, this is the cheapest and easiest solution I know of.
Will NOT work on any vehicle except the S2000 using an OEM instrument cluster. If you have an S2000 cluster in another car this will not work for you.
Yellow Jacket Speedometer Corrector
Pic of RHD wiring (sorry, this is all I have, sent by a UK customer)