SKU: 86488208381

AirDog II-4G DF-165 for GM Duramax 2015+ 6.6L

Sale price$359.55 Regular price$399.50
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Ships within 48 hours · Estimated delivery Aug 31 - Sep 5

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Description

AirDog II-4G DF-165 for GM Duramax 2015+ 6.6LAirDog II 4G is designed to operate at flows and pressures beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air vapor, particulate contaminates and unknown quantities of water. The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the gear rotor fuel pump. The fuel, with only entrained air vapor and tiny particulate

AirDog® II-4G is designed to operate at flows and pressures beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water. 


The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the gear rotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining enters the fuel pump. 


The fuel, now under positive pressure flow, enters the fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented AirDog® II-4G the separated air/vapor is discharged from the filter and back to the fuel tank through the Primary Air/Vapor Discharge Port. 


The fuel passing through the filter media is now free of contaminates and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator. 


Benefits of the AirDog® II-4G:

  • Increased Fuel Economy
  • Increased Power Output
  • Increased Torque Output
  • Longer Injector Life
  • Improved Throttle Response
  • Reduced Exhaust Emissions
  • Optimized Engine Performance
  • AirDog® II-4G also overcomes loss of power for diesel engines operating at higher altitudes.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 86488208381

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4.7 ★★★★★
Based on 22 reviews
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M
Verified Purchase
MG
Phoenix, US
★★★★★ 5
Great jeans but order a size bigger than you think.
Size: 16, Color: Double Talk
Great looking jeans but returned due to size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2025
J
Verified Purchase
JMM
Pawtucket, US
★★★★★ 5
Great Jeans!
Size: 14, Color: White, Size: 14, Color: White
Love these jeans! They're my favorite pair. Very comfortable and breathable. I got a size 14 and they fit great, the adjustable waistband is great. I am 5'0 and weight 98lbs. My inseam is 25 inches, waist is 24 inches, and hips are 34 inches. Hope this helps
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Reviewed in the United States on March 13, 2026
L
Verified Purchase
Lauryn E.
Lexington, US
★★★★★ 4
Awkward sizing but decent fit
Size: 16, Color: Double Talk
I normally wear a girls 14 but had to size up with these. The waist was slightly too small while the length was right. After sizing up to a 16, the waist fit perfectly but the pants were too long. They look alright with heels or platform sandals but with any other type of shoe, they would need to be cuffed or shortened at the hem. I’m 4’11” and about 114lbs
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Reviewed in the United States on June 16, 2025
W
Verified Purchase
WM Yeh
Draper, US
★★★★★ 5
Great quality
Size: 8, Color: Double Talk
Great quality jeans! My daughter needed blue jeans for her choir performance and I only found out right before the show. I’m so glad I could find a pair on Amazon and get it the next day — what a life saver! They fit well and she was so happy to wear her first Levi’s!
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Reviewed in the United States on February 15, 2026
J
Verified Purchase
Julie Fraley
Lake Worth, US
★★★★★ 5
Levi jeans
Size: 8, Color: Doubt It
Fit great.
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Reviewed in the United States on May 11, 2026

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