This is a must have if you are using an HHO Generator setup. This is the ultimate HHO add on, allowing you to have full control over your fuel intake. The gas mileage benefits are not seen without this device. With this unit you will have complete control over you map sensor with a flip of the switch. You can take your car from factory standards to the enhanced setup. Built using Water4Gas technical specs, the unit has one potentiometer of 270 degree rotation for precise adjustment .

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