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Description
Airdog II-5G 220 GPH Air Fuel Separation Lift Pump System 11-16 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 2011-2016 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-220 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-220 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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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.6 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Sexy but HIGH
Size: 6, Color: Nude/Nubuck, Size: 6, Color: Nude/Nubuck
Sexy heels, they look great. They hurt my feet because I didnt break them in before wearing them for my event.
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Good heels
Size: 11, Color: Pink/Pat, Size: 11, Color: Pink/Pat
Comfortable heels. I got the pink ones. I’m a 10.5 womens so I ordered the size 11 and it’s a tad too big so I might order a second pair in a 10 and see how they fit. One star taken off because there was glue on random parts of them but it came off easy. Also, the threads on the sole where they stitched it on are a bit loose but not a problem. Otherwise they are good quality heels.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Good purchase, no issues and made my feet look beautiful
Size: 8.5, Color: Black/Nubuck
I spent a year walking around S. Korea in heels and boots, spent many more in the beauty industry and my whole life running for sport so I have experience with my feet in shoes...these are golden for me.
Ordered 8.5 and they fit well, not uncomfortable for long periods and adjustable for my smaller ankles. They were grippy and flexed well going into an incline while walking. My feet did not slide as I walked downhill so my toes stayed within the sandaled heel. I'm pretty light on my feet and these shoes were pleasantly light as well.
What I liked the most is that they were packaged well in their own shoe bags. Would purchase again in other colors.
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Reviewed in the United States on December 12, 2025
★★★★★ 5
Cute and good quality.
These are so cute. Fit true to size. I love the suede feel of the material.
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Reviewed in the United States on April 12, 2026
★★★★★ 3
uncomfortable but cute
Size: 5.5, Color: Black/Nubuck, Size: 5.5, Color: Black/Nubuck
these were cute but super uncomfortable and the ankle part didn’t fit me very well. also the heels didn’t fit me very good, my foot was slipping a lot.
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Reviewed in the United States on January 25, 2026