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Description
AirDog II-5G A7SABC513 DF-165-5G Air/Fuel Separation SystemThe AirDog II 5G A7SABC513 DF 165 5G Air Fuel Separation System from GAP is a state of the art fuel delivery system for your 2015 2016 GM 6. 6L Duramax LML (Moderate To Extreme). All 5G systems also come with upgraded wiring harnesses and connectors. The wiring harness features 12 gauge wire from the battery all the way to the internal connections in the motor. A Metri Pack 280 connector replaces the Deutch 2 pin connector which allows more current
The AirDog II-5G A7SABC513 DF-165-5G Air/Fuel Separation System from GAP is a state-of-the-art fuel delivery system for your 2015-2016 GM 6.6L Duramax LML (Moderate To Extreme).
All 5G systems also come with upgraded wiring harnesses and connectors. The wiring harness features 12-gauge wire from the battery all the way to the internal connections in the motor. A Metri-Pack 280 connector replaces the Deutch 2-pin connector which allows more current flow without creating excessive heat. All other connectors in the harness use weather packs, to help keep the elements out.
The AirDog II-5G offers protection and performance like no other lift pump. Their patented air separation, along with a water separator, and fuel filter makes sure the expensive components in your fuel injection system get all the clean fuel they can handle. This also helps overcome any loss of power due to driving, especially in higher altitudes with a factory fuel pump. Furthermore, this system improves engine performance by eliminating spray pattern disruption due to air entering the system. This allows the engine to keep its designed injection timing which allows a more complete burn of the fuel entering the cylinder. This increases overall engine efficiency across the power and torque range.
The AirDog II-5G is the first diesel Fuel Air Separation System to include an integrated diaphragm fuel pressure regulator. This regulator allows for more fuel pressure adjustability, offers better fuel flow at pressure, and can be boost compensated. This system features the same 4G motor technology that has proven itself to be a reliable, quiet operating system. It also retains the "Demand Flow" of the older AirDog II variants. Demand Flow means whatever fuel the injection system does not use gets recirculated back through the filter base.
All 5G systems also come with upgraded wiring harnesses and connectors. The wiring harness features 12-gauge wire from the battery all the way to the internal connections in the motor. A Metri-Pack 280 connector replaces the Deutch 2-pin connector which allows more current flow without creating excessive heat. All other connectors in the harness use weather packs, to help keep the elements out.
The AirDog II-5G offers protection and performance like no other lift pump. Their patented air separation, along with a water separator, and fuel filter makes sure the expensive components in your fuel injection system get all the clean fuel they can handle. This also helps overcome any loss of power due to driving, especially in higher altitudes with a factory fuel pump. Furthermore, this system improves engine performance by eliminating spray pattern disruption due to air entering the system. This allows the engine to keep its designed injection timing which allows a more complete burn of the fuel entering the cylinder. This increases overall engine efficiency across the power and torque range.
The AirDog II-5G is the first diesel Fuel Air Separation System to include an integrated diaphragm fuel pressure regulator. This regulator allows for more fuel pressure adjustability, offers better fuel flow at pressure, and can be boost compensated. This system features the same 4G motor technology that has proven itself to be a reliable, quiet operating system. It also retains the "Demand Flow" of the older AirDog II variants. Demand Flow means whatever fuel the injection system does not use gets recirculated back through the filter base.
Features:
- Integrated Diaphragm Fuel Pressure Regulator
- Larger Ports Over Previous Pumps
- Demand Flow Design
- Includes Wiring, Plumbing, & Installation Hardware
- 165 GPH Fuel Pump
- Lifetime Limited Warranty
- Low Flow Return For Reduced Aeration
- Better Fuel Flow At Pressure
- Enhances Engine Efficiency
- 12-Gauge Wiring Harness
- 4G Motor Technology Provides Reliable & Quiet Operation
WARRANTY INFO:
Limited Lifetime
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Commfrotable and warm
Size: Large, Color: Dark Grey
Very light weight and comfortable.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Right size item
Size: Small, Color: Light Grey
Make sure you order the right size. I received Small size & not Large. My fault. But, it still fit ok, a little snug, yet it made me feel warm when I went outside. I will be ordering a large size in the near future. Some one else in the family will get the small size item.
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Warm
Size: XX-Large, Color: Black
13. Degrees at work this morning and with these as a base layer I was perfectly warm and comfortable.
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Reviewed in the United States on February 8, 2026
★★★★★ 5
I think I could have been OK with a medium instead of a large, but still warm and comfy !!
Size: Large, Color: Dark Grey
Very Comfortable, and warm!! Cold weather in PA this winter !!!!
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Worthy value.
Size: Large, Color: Dark Grey
Good underwear has a price.
This is definitely worth the investment. Not a heavy warm, but definitely a good cold day layer. Wore them in the house as sleeper.
They fit like spandex with a fly.
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Reviewed in the United States on February 12, 2026