Air Fuel Ratio Gauge with O2 Sensor, Digital Display 2-in-1 Air Combustion Meter

58 reviews for Air Fuel Ratio Gauge with O2 Sensor, Digital Display 2-in-1 Air Combustion Meter

1. Natalie NealVerified Purchase

   Rated 5 out of 5

   As always it was delivered in true Amazon fashion, nearly before I ordered it. The gauge response time is almost non-existent, it's so fast. In fact i...More

   As always it was delivered in true Amazon fashion, nearly before I ordered it. The gauge response time is almost non-existent, it's so fast. In fact if I have any complaint, it is the LED needle is way too responsive, it needs to be dampened a little so it is more apt to display an average, but with a short decay time. Other than that I am 100% pleased and look forward to using it when I add the turbo. Thanks again Amazon, and of course AEM for their superior, yet affordable products. <:/)
   Dexter LongVerified Purchase

   Rated 5 out of 5

   Looks like it is built pretty decent, though the case is a very cheap plastic and would of preferred metal but seems everything is plastic nowadays. I...More

   Looks like it is built pretty decent, though the case is a very cheap plastic and would of preferred metal but seems everything is plastic nowadays. I installed it and the sensor screwed right into my existing bung. The threads are precoated with I think is anti-seize. The sensor cable is plenty long enough for my application and I probably will end up with a glove box full of rolled up cable. Once I get it running, I will try to update my review here.
   Lillie LindseyVerified Purchase

   Rated 5 out of 5

   What can I say, AEM is AEM :) I bought this one for my friend. Previously bought 2 of them, one for me, other one for my other friend. Mine is install...More

   What can I say, AEM is AEM :) I bought this one for my friend. Previously bought 2 of them, one for me, other one for my other friend. Mine is installed on Toyota Mark II IR-V. Second one is installed on friend's V7 STI, and this particular item is already installed on EVO 3. All of them are working great! Installation is very easy, and package contains everything needed for the installation.
   Macy MorrowVerified Purchase

   Rated 5 out of 5

   Simple installation and works great. Very easy to read digital and range LED graphics. I am using it to tune and monitor an older twin carbureted engi...More

   Simple installation and works great. Very easy to read digital and range LED graphics. I am using it to tune and monitor an older twin carbureted engine. It is sensitive enough to quickly read ratio fluctuations so it does jump around under normal driving, but I prefer it like it is to get a feel for how the carbs transition under acceleration etc. I am very pleased overall.
   Shakira KentVerified Purchase

   Rated 5 out of 5

   This has worked great on my race car for several weekends. Love the fact that it does not need to be calibrated in clean air like some others. I have ...More

   This has worked great on my race car for several weekends. Love the fact that it does not need to be calibrated in clean air like some others. I have 2 Innovate Motorsports Wideband gauges on other cars and they seem to constantly need to be re calibrated and to do that on them you have to remove the O2 Sensor and that can take 20 minutes. The next one I buy will be a AEM.
   Darragh LittleVerified Purchase

   Rated 5 out of 5

   Easy to install, straight forward and I love how much wire they provided. After I neatly installed the gauge, I had plenty of wire to wire tuck and to...More

   Easy to install, straight forward and I love how much wire they provided. After I neatly installed the gauge, I had plenty of wire to wire tuck and to hide it away out of sight. Refresh rate and accuracy of AFR’s blows its competitors out if the water. I would highly recommend this to anyone that wants to know exactly what’s happening in their exhaust
   Oskar RichmondVerified Purchase

   Rated 5 out of 5

   I have been looking for a AEM wideband AFR gauge for a while now and i finally saw this on Amazon for an awesome price. They usually go for more than ...More

   I have been looking for a AEM wideband AFR gauge for a while now and i finally saw this on Amazon for an awesome price. They usually go for more than $200. This gauge works perfectly and is an authentic AEM gauge. It comes with 2 gauge face colors, black n white, and it includes all wiring needed for installation and easy to follow directions.
   Jake TownsendVerified Purchase

   Rated 5 out of 5

   Ordered with the gauge mounting cup and both came shipped together within 2 days (didn’t opt for priority). Packaged very nicely and product is of str...More

   Ordered with the gauge mounting cup and both came shipped together within 2 days (didn’t opt for priority). Packaged very nicely and product is of strong quality, looks exactly as it does in the image. Comes with all necessary parts to install into vehicle etc. Can’t wait to install and tune...will follow up afterwards with another review.
   Zackary NewmanVerified Purchase

   Rated 5 out of 5

   After buying 2 AEM AFR meters only to have the first one have a bad sensor and then its replacement to have a bad sensor too I returned both of them a...More

   After buying 2 AEM AFR meters only to have the first one have a bad sensor and then its replacement to have a bad sensor too I returned both of them and I purchased this one to replace the AEM units. I wish I had bought this one first. No issues with it. I will stick with AutoMeter in the future and forget about AEM gauges.
   Larry EverettVerified Purchase

   Rated 5 out of 5

   Bought this to put on a 1915cc VW powered sandrail with a 2 barrel carb. This thing is an engine saver. The jetting was all wrong in my carb so I chan...More

   Bought this to put on a 1915cc VW powered sandrail with a 2 barrel carb. This thing is an engine saver. The jetting was all wrong in my carb so I changed all the parts out and it runs better than ever before. Important that you dont mount this near the exit of the exhaust because you will get inaccurate readings