Map or MAF Sensor Enhancers are needed in order to get the most efficiency out of your hydrogen generator conversion. it does so by interacting with your car's Map sensor. It also helps the (ECU) recognize the Hydrogen. The Map Enhancer is used on mostly Diesel vehicles, and older cars that don't have Oxygen Sensors installed.
 HHO Dual Edge MAP MAF Sensor Enhancer Water4Gas EFIE US $24.99 |
 Oxygen Sensor Tuner HHO o2 enhancer EFIE MAP MAF US $110.00 |
 MAP SENSOR EFIE ADJUSTER ENHANCER HHO IN DASH DESIGN US $39.99 |
 MAP MAF Sensor Enhancer Kit Dual Edge HHO WATER4GAS US $14.99 |
 Map Sensor Enhancer HHO Hydrogen Gen Water4Gas Economy US $15.00 |
 HHO MAP MAF SENSOR ENHANCER US $299.99 |
 O2 SENSOR EXTENDER HYDROGEN HHO PWM EFIE MAP MAF CEL US $29.99 |
 COMPLETE HHO CONTROL UNIT PLUS MAP MAF AND O2 SENSOR US $60.00 |
 MAP MAF Sensor Enhancer Kit Dual Edge HHO WATER4GAS US $9.99 |
 MAP SENSOR EFIE ADJUSTER ENHANCER FOR HHO GENERATOR US $43.29 |