Hks V-pro
#64
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The older unit was called the Knock Amp. It is silver with a silver display like an EVC 5. These units did not come with a wideband sensor either, and the sensor is a NTK sensor instead of the Bosch LSU sensor that came with your AFK.
#66
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Personally, I would pick up the newer one as the replacement sensors are much cheaper for a Bosch LSU vs. the NTK sesnor. Also, setting up the knock sensor to be read to the ecu for the AFK is much easier than the older models by far.