This is the digital unit (O2 sensor is not supplied)
To tune your carbs for the best mixture either thro a single sensor on the mid -pipe or thro 4 sensors & 4 digital units.
The digital units can be removed & the sensor nut blocked of after the tune has been done .
The point of all this is to see who would like to get one as I have discovered a surplus set (probably 25 or so ) with an electronics designer surplus to requirements and there fore likely to be able to be bought either bulk or in ones & two 's at sensible money/
Interested parties PM me
