The green sensor is 0 - 15 PSI (fuel pressure)
The shorter brass sensor is 0 - 100 PSI (
oil pressure)
note both of the pressure gauges have a hole in the end
The longer brass sensors with out a hole in them are temperature sensors. One for
oil temp and the other for water temp.
The water temp sensor goes into the intake manifold right behind the thermostat. The
oil temp sensor goes in the oil pan.
Hope this helps.