The 18/1 Fuel Enhancer (EFIE)  A new improved *narrow band EFIE using modern micro electronics. Designed by a electronic wizard friend. Guaranteed to work as described or your money back. Since the orginial EFIE is hard to get, we decided to try to improve the EFIE and come up with something simular. It is simple, just 4 wires to install. (+) & (-) and IN & OUT to your oxygen sensor signal wire (spliced in) Comes with down-loadable instructions. Will help in leaning out your Air/Fuel ratio to 18/1 rather than the standard 14.7/1 Will help increase gas mileage. Along with a good running hydrogen booster you will experience more horsepower, better mpgs and cleaner emissions. Comes with small 1" x 2" x 3" black plastic box & velcro. All you do is drill one small hole to access the tiny 10 turn potentiometer & add 4 - 20-22 guage wires. (copper stranded wire) (Comes pre-assembled, no soldering) MADE IN USA

*The 18/1 works with Narrow band O2 sensors, Ford , GMC, for Wide Band sensors : BMW, Merecedes, some Chrysler, some Toyota 97 & newer click here. Wide band O2 sensors, usually have more than 3 wires coming out of the O2 sensor, but not all, check your Clymer manual or AllData.

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