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Oxygen sensor spacer Without Oxygen sensor spacer With Oxygen sensor spacer Oxygen sensor spacer for hho Oxygen sensor spacer - CAD
The Oxygen Sensor Spacer installed

If you want to save fuel using HHO, you need a way to inject less fuel to the engine.

Can be easily achieved be Oxygen Sensor Spacer : Just plug in between the pipe and the sensor and take a test drive.

Oxygen sensor Spacer in work. Installation never been easier

Where to get Oxygen sensor Spacers ?

Spacers are widely available and very cheap also. If you deep into HHO project and haven’t yet found solution on how to reduce air / fuel  ratio during injection this part is perfect for you: get it now for the best price here.

It is possible to increase internal combustion engine efficiency when using Hydrogen gas saver (increase air / fuel ratio) using this small metal part called “oxygen sensor spacer ”.

A removal of the oxygen sensor from a direct contact with the exhaust gases to a farther place, where the oxygen reading will be reduced using the spacer.

Normal:                                                            With Spacer:

The bigger the L size the less oxygen the sensor will “feel”. The result is: the car computer will order to inject less fuel and the combustion will be leaner.

This method isn’t working for all cars but many people still got excellent result using this part together with the hydrogen gas saver.

The spacer is a very cheap part and it is worth a try before installing more expensive system such as EFIE.

Install instructions:

1)screw out the oxygen sensor using a 18 mm wrench. When the sensor is out don’t touch it’s head no matter how dirty it is.

2)screw the sensor into the spacer part (once again beware damaging the head)

3)screw the spacer combined with the sensor into the sensor’s place on the exhaust manifold.

4)activate your booster and take a test drive to check fuel consumption.

Important Notes:

A)My recommendation is to get two spacers : First time make a test run with one spacer, second time try it with two spacers connected in-line between the sensor and the manifold.  

B) Notice not to run your engine using the Spacer part without the Hydrogen booster. A lean combustion without Hydrogen addition could hurt the engine.

C) If your oxygen sensor is close to his death (worked for 35000 Miles or more ) there is a probability that the extraction will finish it’s life due to the stress. In this situation it is recommended to prepare a new sensor and install it with the Spacer part instead of the old sensor. Old or bad sensors have negative effects on the engine and they make your car to use more fuel than necessary (good prices on new Sensor(s) here).

D) If your car have 2 sensors between the engine and the catalytic

converter, it is necessary to install one (or two) spacer(s) on each


Oxygen Sensor