AIRDog A7SABD427 II-5G DF-165-5G AIR/FUEL SEPARATION SYSTEM FOR 2019–2023 CUMMINS 6.7L 24V

Product Description

Airdog A7SABD427 II-5G DF-165-5G is a 165 GPH, demand-flow air/fuel separation and lift pump engineered for the 2019–2023 RAM 2500/3500 6.7L Cummins (24-valve). It removes entrained air, water, and particulates before they reach your CP3/CP4, stabilizing rail pressure, improving throttle response, and extending injector life.

• 165 GPH II-5G pump with quiet, reliable motor and demand-flow regulation.
• Frame-rail mount with supplied sandwich-plate bracket for clean installation.
• Fuel Module Upgrade Kit draws through a 1/2" bulkhead (bypasses in-tank lift pump).
• 2-micron filtration plus water separation for superior injector protection.
• Air/Vapor return routes separated aeration back to the tank for consistent supply.

Vehicle Fitment

RAM 2500/3500 with 6.7L Cummins 24V: 2019, 2020, 2021, 2022, 2023.

Installation Instructions

Download the official installation manual for DF-100/DF-165/DF-220 systems (2019–Current Cummins): AirDog II-5G 2019–Current Cummins Install PDF (#47).

Cross-Reference / Alternatives (Airdog only)

• A7SPBD255 II-5G DF-100-5G (2019–2023 Cummins) – 100 GPH
• A7SABD530 II-5G DF-220-5G (2019–2023 Cummins) – 220 GPH
• A4SPBD106 FP-100-4G (2019–2023 Cummins) – Original AirDog 100 GPH
• A4SPBD109 FP-150-4G (2019–2023 Cummins) – Original AirDog 150 GPH
• A7SABD526 II-5G DF-165-5G (2004.5–2018 Cummins) – Earlier-year fitment

Recommended Service Parts

• Fuel Filter 2-Micron: FF100-2
• Water Separator: WS100

FAQ

What horsepower level is the DF-165-5G ideal for?

DF-165-5G comfortably supports stock to moderately tuned 6.7L Cummins builds. For heavy fueling upgrades or competition use, consider the DF-220-5G.

Does this bypass the factory in-tank lift pump?

Yes. The included Fuel Module Upgrade Kit draws through a 1/2" bulkhead fitting and routes the system to the frame-mounted II-5G pump.

Will it over-fuel my system at idle or cruise?

No. The II-5G uses a demand-flow regulator; unused fuel is returned to the tank so pressure and volume stay in the target window.

What filters does it use?

Use Airdog FF100-2 (fuel) and WS100 (water separator).

Is there a warranty?

Airdog provides warranty coverage per their terms; see the install manual and manufacturer page for details.

Specifications for airdog A7SABD427