RA003B AFM/DFM Disabler-Blue

Awesome, plug and play. No more pinging noise and the performance increase is very noticeable. I hesitated to buy this, but it has been the best purchase I’ve made in a very long time.

Easy to install. Appears to be working fine

I bought the Range AFM disabler. I plugged it into my vehicle and went for a drive at various speeds in and out of the city. My vehicle stayed in V8 at all times. The device performed as advertised.

Fabulous for your engine life, works perfectly to keep engine in V8 mode

I spent the money on this one because I didn’t want to introduce any surprises by going with a cheaper product that isn’t supported by Holley. It works great 90% of the time. The other 10% it doesn’t do anything. I usually find out at the first stop of my drive when the engine auto stop cuts the power and the engine stops running until I take my foot off the brake. I’m not sure why I am getting that intermittent problem, but hey, I’m gaining .000000000001% gas mileage and saving the planet at the same time, so it’s totally worth it.

This is my 4 GM truck (18 Escalade) with the AFM & although I haven't had any lifter issues (knock on wood) yet. I have noticed a power lag across the 4 trucks, witch is why I decided to get this disabler for this truck. So far I've noticed that V8 420hp's back full time with avengeance. This is well worth the money considering the potential issues & money a failed lifter can coast.

Purchased this Range Technology AFM disabler for a Tahoe with 5.3L V8. My Tahoe would drop into the 4 Cylinder mode often, very annoying. I have never gotten used to the hesitation when the engine shifts back into the V8 mode in response to my attempt to accelerate, especially from a dead stop. When driving in normal traffic situations the 5.3L FMS constantly put the engine in and out of V8 to V4 and back distracting from the driving experience. Freeway driving was another area where the 5.3L FMS would drop the engine into V4 when my foot came off the pedal or while coasting which is especially annoying while towing a 6500 lbs. RV or when attempting to pass another vehicle. Installing the Range Technology Disabler has solved these problems and I have noticed the vehicle drives much smother. Yes, it cost more than the knockoffs, but I believe it's worth it. My first AFM disabler was a top-rated knockoff brand, cheaper for sure, but I found it didn't work as I thought it should have, it kept the Tahoe's 5.3L in V8 mode but something was missing, it wasn't smooth running like I experience with Range Technology FMS disabler also there was no way to see the lights on the disabler as they were partially covered with the wrap. Remember the old saying "You Only Get What You Pay For" applies here. I am pleasantly surprised with the build quality, ease of installation and the function of the Range Technology device. Only thing I don't like, nothing in the instructions give you a clear understanding of what ALL the light functions indicates but you can go to Range Technology's web site. Also, I have had no issues with the truck's battery SOC and I have seen a slight increase in fuel economy. I do recommend this device.

So far seems to work fine in my 2020 GMC Denali 6.2. The stop/start garbage is hard on engines. This will rectify that. I believe the actual model i have is the 7, not the 3.

works great on my 2019 Sierra. Doesn't seem to kill battery. I like it!!

Cumple con lo que promete, mejora el funcionamiento. El paquete llegó abierto sin embargo funciona, solo tengo dudas, no especifican si tiene garantía

Works as intended, using it in a 2018 Camaro SS

I am in Australia. Ordered through Amazon. I read as many reviews I could find. Used in the Chev 1500 Silverado for a week or so and found it to be as advertised. Can't fault it at this time.

Menciona que evitará que el motor del vehículo se pare en los altos, pero continúa apagándose, no sé si la verdad funciona o no, no veo ningún cambio en el ruido del motor, o no sirve, o está defectuoso o no es compatible, lo usaré un tiempo y si no veo ningún beneficio lo regresaré