Wideband UEGO Air/Fuel Ratio Gauge 30-4110 Black, LSU 4.9 Lambda WideBand O2 Oxygen Sensor 17025, AFR Sensor Controller Gauge 30-0300 White, Gauge & Sensor Kit Compatible with 30-4110 30-0310

The media could not be loaded. Buy this with a genuine Bosch wideband sensor, I used bosch part number 17212 and it's plug and play with the included sensor harness and the cheapest easily available wideband they make currently, as others have stated on other listings for this gauge, stock sensor is poor quality and will die quickly. You're buying this for the gauge display only, that packs the same features as what it's a "clone" of, the original AEM UEGO, and most likely it's the same exact gauge and just rebranded, as quality is high on the internal PCB, good solder joints on all components etc. You won't be able to bench test the gauge, it will appear broken, I thought it was at first, it will just climb AFR and then error out to the dashes on the LCD above 20.0 AFR, so if you want to test before a full install you will need to have the sensor installed on your exhaust and have the motor running. Had it installed 2 weeks and it's been working great. Also, not mentioned in the listing is that it auto dims and brightens depending on ambient light, it has a photo cell that reads ambient light levels, it's kind of dim at night for my taste, but still very readable, I just prefere it stay at max brightness, which I'll have to bypass the photocell to achieve since there is no manual brightness control I could find.

I tried using this gauge to adjust the carburetors on an old car. The installation went fine but the readings were erratic. After a week of trying to get things working, I decided to send it back. This is a knock off gauge, even to the manual, is says that it is an AEM gauge! it doesn't have all the functions that are shown in the manual. At the price, I didn't expect it to be a real AEM, but I had hopes it would work.

Works great use it at crow's Auto Repair on Facebook to help with tuning

The media could not be loaded. Gauge is on a 421 sbc with hyd cam to 6000. with proform 650 carb Was to lean I have close now. Going up one jet size more to get a 13:1 fuel ratio at cruse speed 70 mph @ 3000 rpm So far no issues

Very nice, shock proof packaging.Very good instructions. Easy to understand and install. I used my neighbors welder to weld in the mounting bung into the exhaust pipe, although someone makes a clamp on mount, you still have ti drill a hole in the pipe first. A Muffler shop could do it too.READ THE INSTRUCTIONS FIRST!

(Original review) For the money I can't really complain lol. The only thing I'm worried about and might replace is the cheap 02 sensor but other than that I like it. The light is super bright too. Just make sure you do a open air calibration before installation, I didn't so it not reading accurate but I'll get do that eventually lol(Update) I made this review earlier today and I hop in my car this afternoon and I see this SMH. I'm pretty sure the pod went out, it doesn't read anything anymore and all the lights are on.

I replaced the sensor with in 6 months of use. I put in a Bosch and it reads way better but the gauge is what you are really buying here.

Built a SBC for a jeep yj swap with a 625 street demon,tuned by vacuum and was always rich,after attaching this was able to dial it in,i was off by over a half screw out by the vacuum method,i put a bung on each side"dual exhaust" with 2 bosch wide bands and swapped the unit connector one to the other to check,money well spent and no more guessing/hoping its right