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Description
Airdog II-5G 165 GPH Air Fuel Separation Lift Pump System 11-14 6.6L GM Duramax LMLWhy GM opted to not include a factory fuel lift pump on all of the early model Duramax's is still a mystery. This lack of consistent fuel pressure coupled with the switch from the proven CP3 to a CP4 injection pump beginning in model year 2011 has spelled disaster on these trucks, especially for those trying to increase the horsepower through performance programmers and or larger displacement injectors. Even at stock power levels, this insufficient
Why GM opted to not include a factory fuel lift pump on all of the early model Duramax's is still a mystery. This lack of consistent fuel pressure coupled with the switch from the proven CP3 to a CP4 injection pump beginning in model year 2011 has spelled disaster on these trucks, especially for those trying to increase the horsepower through performance programmers and/or larger displacement injectors. Even at stock power levels, this insufficient fuel pressure and volume equates to limited overall power, decreased fuel economy, and potentially harming the injection pump and injectors due to a lack of lubrication.
The AirDog II-5G is an all in one premium fuel pump and filtration system for your 2011-2014 LML Duramax diesel. This system removes water, particulates, and entrained air from the diesel fuel. The entrained air that is separated from the fuel is returned to the tank through a small return fitting. The fuel is delivered to the engine at the correct pressure and flow rate to meet the demands of the engine under all operating conditions.
The AirDogII-5G DF-165 systems feature a built in adjustible diaphragm pressure regulator. All AirDog II-5G systems include a complete installation kit. The AirDog II-5G, for this particular application, is preset at 8-10 psi from factory for a stock application. The regulator is adjustible up to 55 psi for fine tuning the system to perfectly match up to your current and future performance upgrades.
HOW IT WORKS:
The AirDog II-5G DF-165 draws fuel from the fuel tank through a 5/8” suction line to reduce the risk of cavitation at the pump. The fuel is then drawn through the water separator where 92% of water is removed per SAE spec 1488. It is then pressurized through a Gerotor pump and sent to the 2 micron fuel filter before it is sent to the injection pump. The air from aerated fuel, due to tank sloshing and engine return lines, is separated and sent back to the tank through the 3/8” return fitting. The excess fuel that the engine does not use is recirculated through the diaphragm regulator back to the suction side of the pump.
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4.2 ★★★★★
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Product Reviews
★★★★★ 5
Stacking shelves
These work perfectly, even in rooms with high ceilings. One thing I didn’t really see mentioned or highlighted anywhere is that they can be stacked. I decided to try it anyway, and it turned out awesome. I purchased two units and placed one on top of the other, which essentially created one tall shelf. It ended up being a great way to maximize vertical space and made the setup look much more custom and intentional
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Reviewed in the United States on March 11, 2026
★★★★★ 5
Do not hesitate!
I was hesitant with some reviews saying it comes with scratches. This was packaged extremely well and it only had one or two very minimal scratches that you barely can even see. It is very sturdy and took about 40 minutes to build. It looks amazing and is not bulky but holds a lot which I love. After building this one, I immediately ordered a second one to go on the other side of my window. My son walks in and saw this bookcase and now wants one for his room, so I will be definitely ordering more.
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Reviewed in the United States on December 4, 2023
★★★★★ 5
Good quality
I like how looks and good quality material for the price , I’m not complaining . Good job seller , keep customer satisfaction. Thanks
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Reviewed in the United States on February 24, 2026
★★★★★ 5
I love this shelving unit!
We recently moved into a smaller home and I was struggling with storage. I found this and I’m so glad I did.
It looks so good and I was able to assemble pretty quick, I think like 20 mins. I still need to get my husband to attach it to the wall but it’s the prefect size for my space.
The only thing I wish was better is the instructions to assemble. It’s really easy once you figure it out but the instructions are just a few pictures on a small piece of paper.
I love it!!!
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Reviewed in the United States on October 28, 2022
★★★★★ 5
Looks Fabulous!
Love this shelving unit. The golden honey with dark colors wood looks real even though it's a laminate. I like the open look. It's strong and holds a lot. Super easy to put together. I absolutely love mine.
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Reviewed in the United States on June 1, 2023