Home > Hydrogen Assist Products > HHO Electronics > EFI Enhancers (EFIE)
Electronic Fuel Injection Enhancer (EFIE) Devices for controlling Oxygen Sensors that are equipped on your vehicle (if needed). For more information on EFIE devices, please visit our Knowledge Base.
Sort By:
Page of 1
Narrowband EFIE Wideband EFIE
Narrowband O2 Sensor Enhancer (EFIE)
MSRP: $124.95
Price $104.95
Savings: $20.00
Wideband O2 Sensor Enhancer (EFIE)
MSRP: $124.95
Price $104.95
Savings: $20.00
For vehicles equipped with upstream Narrowband O2 Sensors. For vehicles equipped with upstream Wideband O2 Sensors.