A Transitional Technologies, LLC Website
Transitional Technologies HHO kits direct.com

my cart view help
office hours for hho kits direct .com in Concord CA


   hho kits direct categories


These power packed QUAD EFIE/MAF/MAP Advanced Tuners are perfect for the basic hho generator installation. The Narrow band version covers up to 4 Narrowband O2 sensors, and choice of either MAF or MAP (don't need both). The Wideband version covers two Front Wideband sensors, and up two Rear Narrowband sensors.

  • It includes a MAF/MAP connection to lean the fuel flow
  • QUAD EFIE (Up to 4- O2 sensors) get the additional leaning power you need to see long term gains
  • WIll not harm or change ECU programming

    If you want Long Term gains- use this Advanced Tuner! The MAF/MAP affects timing, the EFIE's control Air/Fuel Ratio (AFR)


These NEW DIESEL TUNERS will adopt to work with 95% of all
Diesel Powered Vehicles without 02 Sensors! These do what other automated chips promised to do, but didn't deliver. They come with a Thermostat switch (included) which keeps it from activating until engine reaches the proper temperature, preventing error codes and fuel map restrictions.

  • It includes a MAF/MAP connection to lean the fuel flow to engine
  • An IAT (Intake Air Temp) sensor to retard timing and give additional leaning
  • CTS (Coolant Temp Sensor) adjustment forces more leaning of fuel
  • Will not harm or change ECU programming

    Car or Truck- if you have Diesel, this is what you need with your Hydrogen kit for long term gains.

right arrow HOME Page
right arrow PWM Controllers- HHO Kits
right arrow Efie's, Maf's- HHO Kits
right arrow FAQ Questions and Answers
right arrow Become an Affiliate or Dealer
right arrow
Mileage Results
right arrow
Contact Us

  Like us on Facebook- follow hhokitsdirect Check out our videos on You Tube HHO kits direct.com
  sign up for emails from hho kits direct here


($99 with a Kit)




($99 with a kit)



($89 with a Kit)


    30 day return policy for our hho kits  

pro tuner chip for HHO generator systems

The ULTIMATE in control over the important engine map sensors that are affected by the introduction of Hydrogen gas. If you are a tuner, a gearhead, a programmer, or an experienced mechanic - we have a solution for you that will give amazing Long Term Results with a well built HHO Generator kit! Unbelievable control that up to now has not been readily available to the industry.

If you are not intimidated by sensors and how they interact with the engine and the ECU, then THIS is the Tuner Chip for you! Everything Volo wanted to do, but fell short!

WARNING: Not for casual experimenter, or those that want to just drop a quick and cheap hho kit in their car. This is SERIOUS Electronic MUSCLE - and if you install as instructed you WILL see Long Term gains heretofore not seen in the HHO industry. Very Advanced and you will need a Scan Gauge or other scanner like at Ultra-gauge.com to dial it in but when you harness its ability- you will see gains like no others...except the ones using this chip to its full power!

  • TSTAT to monitor engine temperature for activation cycle
  • QUAD EFIE for 4 O2 Sensors (choose Wideband or Narrowband below)
  • Extended MAF/MAP sensor enhancer - important to lean out air fuel ratio
  • IAT (Intake Air Sensor) Enhancer - to retard timing and lean engine
  • CTS (Coolant Temp Sensor) important to trim fuel leaner!
  • NEEDS scan gauge or other OBD2 reader to finely tune sensors
  • will not harm or change ECU programming or fuel maps- works with them!
  • Must be used with well made hydrogen cells!
  • Be the Envy of the HHO crowd, and amaze your friends and family!
  • Many reported instances of 80-100% Long term gains*

*As reported by the manufacturer- a mechanic with 55+ years experience. We will compile our own list as time goes on.

  Paypal Merchant secure shopping for our HHO kits and accessories


($199 with a Kit)




($199 with a Kit)




discover if you have wideband or narrow band O2 sensors!
We have recently had the good fortune of meeting a Master Mechanic (with over 55 years of experience) who has an incredible depth of knowledge and understanding regarding the engine sensors of the modern car, theirimportance, and how they play a part in getting serious, long term gains in the HHO industry (or losses when not adjusted in the proper order and voltage)! I was so impressed by his wisdom in this little understood area, that I have negotiated a special dealers agreement with him to get these sensors to our customers right away!

These are very new, and packed with power in a small box. You can buy them individually below, or get a DISCOUNT when purchasing with one of our complete HHO kits.

O2 sensor graphic and how it relates to HHO kits
The O2 Sensors. like the one illustrated above, are like the Captain of the ship- the orders for the amount of fuel going to the engine comes from them, and if you have a modern car and a hydrogen generator- you MUST adjust their signals or suffer loss in mileage. But the Auto MFG's have gotten smart, and are making Long Term Gains even harder with their encrypted programming that reads more than just the feedback from the O2 sensors, but also input from the MAF/MAP sensors, the IAT (Intake Air Temp), the CTS (Coolant Temperature Sensor) and other factors.

Instead of trying to change the programming like many performance chips do, we use these unique electronic TUNERS to "referee and adjust" the signals before they reach the ECU, so as far as the car's computer knows, everything is just running as planned. In reality the engine is running perfectly, and even BETTER, because we are increasing combustion rates, lowering hydrocarbon emissions, lowering fuel consumption, and cleaning the inside of the engine components and still allowing the computer to have the control it needs to do its thing!

What we have discovered in talking with this Master Mechanic is that todays engines have gotten even smarter, and if we want to get Long Term Gains, we MUST adjust the O2 SENSORS AND THE MAF or MAP. This is now the New Standard if you want to see the gains not dwindle over time as the computer realizes the disparity in sensor readings between the O2 and MAF. So at a MINIMUM- get one of the EFIE/ MAF ADVANCED TUNERS below. Choose either Narrow Band or Wideband combo.

If you have a DIESEL Car or Truck, use the NEW DIESEL ADVANCED TUNER below.

And if you are a Serious Gearhead, a Techie, a part time Tuner, or not afraid to get more intimate with the signal wires and tuning tweaks, you will LOVE the NEW EFIE/ MAF PRO SERIES TUNERS below.These are not for the casual HHO enthusiast wanting to "drop and run" a CHEAP kit. You MUST use a Scan Gauge or other reader that can plug into your OBD2 port and read the fuel trims, O2 sensor readings, maf signals, etc. to get the desired results. But if you want the fruits of your labor to really pay off- this is the one to get!

We just purchased an awesome gauge that has all of these and more for only $60 at www.ultra-gauge.com to use on our own test vehicles. If you have a scan gauge that will work as well. The mechanic who designed these has told me he has over 78 reported incidences of customers more than doubling the mileage Long Term, when using the PRO SERIES TUNERS! I am so impressed, I will be installing one of our generators and the Pro Series Tuner on my own Chevy as a test. I will let you know the results...


discover if you have wideband or narrow band O2 sensors!If your vehicle's engine is gasoline powered (petrol), it will use either the narrow band or wide band EFIE's. Click on the LINK to see how you can test to determine what you have, so you can get the RIGHT TUNER. They cannot interchange. GO HERE TO LEARN HOW!




Single EFIE Basic (Dipped)
single efie dipped

Retail: $69.95  SALE: $59.95


SEE MORE here for details on this EFIE


Dual EFIE Basic (Dipped)
dual efie dipped

Retail: $89.95  SALE: $79.95


SEE MORE here for details on this EFIE



The eBay style MAP/MAFs are just simple resistors, which work ok with analog signals, but NOT with the newer frequency modulators. To my knowledge, this is the first combined unit to work with either VOLTAGE OR FREQUENCY (switchable); does away with the need to switch between Highway or City driving like the cheaper stuff. Also, some MAP/MAFS use a voltage increase, not a decrease. Tthis unit is the only one that handles all situations.

The EFIE/MAF combos above are our FIRST choice. That MAF/MAP is designed only for VOLTAGE measurements, not frequency. Generally- most cars and trucks will have at least ONE MAF or MAP that is VOLTAGE adjusted. You can use the above Combos on either one to make it work well. Occasionally, you will run into a car that has both MAF and MAP that are FREQUENCY adjusted. In that rare case- you will need the MAF below in addition to the combo above.

Installation/adjustment instructions included with MAP/MAF enhancer upon purchase.

MAP MAF Sensor Enhancer


Retail: $99.95  SALE: $89.95




More details from the manufacturer:

Our new frequency based MAP/MAF enhancer is the first universal MAP/MAF Sensor Enhancer.  It can be used for devices that output a frequency to the computer, or devices that send an analog voltage signal. 

Frequency Type MAP/MAF Sensors

This device works with any standard 5 volt frequency coming from the device, and will attenuate that frequency based on the position of it's controlling potentiometers.  It will work with frequency type Ford MAP sensors.  It has worked with all frequency type MAFs it has been tested on.  It's frequency range is from 30 Hz up to 17 Khz.  It has been successfully used on a frequency MAF that operated in the range of 7 Khz to 17 Khz.

Analog MAP/MAF Senosrs

There is also an analog port for use with analog voltage types of MAP or MAF.  This is the type of device that are currently controlled with MAP enahancers that you can buy from Ebay.  Most analog MAF/MAPs need to have the voltage attenuated in order to lean the air/fuel mix.  However, some types of MAP/MAF sensor need to have the voltage increased in order to lean the mix.  The Ebay MAP enhancers cannot handle this type of of device.  However, ours can.  By changing one switch position, this device will change from decreasing the voltage to increasing the voltage. 

Note, if you like having a "dual edge" MAP enhancer, where you have to flip the switch to change from city to highway driving, then you won't want to use this board.  This device was designed to be set up properly for general use, and then left alone.  We don't feel that having to manually change settings while driving is necessary or desirable.

EFIE: The Acronym for Better Performance of HHO device

The EFIE is the acronym for Electronic Fuel Injection Enhancer. Why is this important? If you are using HHO generator to catalyze gas efficiency, don’t be surprised if your car is using more fuel as a result. Each vehicle is equipped with a computer (ECU) to ensure that the vehicle is running as it should. When you introduce a gas saver device, the HHO gas is integrated into the engine.

Good so far?

Well, here’s the problem. If the computer in your car feels the extra oxygen injected into its engine, it attempts to balance out the equation by ejecting more fuel. That’s an anathema of what the HHO cell gas savers are trying to do.

The EFIE is the electronic circuit solution to prevent the car from overcompensating. This also makes the maintenance easier. This device has an on and off switch. If you remove the HHO device from your vehicle (particularly during the winter season), you just turn off the electronic fuel injection system so the engine returns to the typical injection mode. When you install back the HHO device, you just set the EFIE back to the “on” position.

We have EFIE for sale to complement your HHO device. What is considered to be normal fuel injection in most engines is actually a very inefficient process resulting to a lot of wastage. The water hybrid will not only boost fuel mileage but also improve the acceleration and efficiency of the engine, resulting to less expense for the maintenance of the car. Browse our catalogue or ask for our advice on which electronic fuel injection enhancer is best for you.

  HHO kits direct footer and other links to hydrogen
  footer and copyright for hho kits direct

Note and Disclaimer: Hydrogen or Hydroxy gas and hydrogen cells are experimental technologies, results vary depending on application and success is not guaranteed.
PWM pulse width modulators for hho kits and hydrogen generators Efie's and Maf's for hho electronic controls on modern cars using hydrogen generators FAQ for hho kits A word about hho kits direct from the founder contact us for any questions regarding our hho kits testimonies from our customers using our hho kits Contact us for help or questions HHO kits warranty and return policy hho kits direct.com shipping policies hho kits direct privacy policy hho kits direct anti spam policy hho kits disclaimer actual mileage results from our customers using our hydrogen generators home page of fedex home page of paypal.com home page of usps home page of ups.com