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USD 620
Part #: PTA4SPBD002

AirDog A4SPBD002 100GPH Air/Fuel Separation System

2005-2018 Dodge 5.9L/6.7L Cummins (Stock to Moderate)
Part #: PTA4SPBD002
★★★★★ ★★★★★ 10 Reviews
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The PureFlow AirDog A4SPBD002 100GPH Air/Fuel Separation System for your 2005-2018 Dodge 5.9L/6.7L Cummins provides the most effective technology designed specifically for diesel pickups to remove water, particulates, vapor and entrained air from diesel fuel. The AirDog is lift pump and filter system, that enhances the fuel delivery to your engine with a commercial duty system.

Your high performance diesel engine demands higher fuel flows. Yet higher fuel flows increase the vacuum at the fuel pump and agitation in the fuel tank. These factors generate additional air/vapor in the fuel system preventing your engine form producing maximum power and efficiency. Additionally, air/vapor can cause galling and pitting of the injector barrel/plunger assembly and also tip erosion. The AirDog eliminates air in the fuel that robs your engine of consistently greater performance and can also cause permanent damage to your injectors. The AirDog also provides the fuel pressures and flows your diesel engine needs to produce maximum power, any time, every time!

The Airdog works by pulling fuel from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of moisture. The fuel passes through the water separator which removes the water and large particulate contaminates. Then, the fuel with only entrained air/vapor and tiny particulate contaminates remaining, enters the fuel pump. Under positive pressure flow, the fuel passes through the fuel filter and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated and returned to the tank. The clean fuel is now free of contaminants and water and flows at the proper pressures up to your engine. Each kit includes plumbing, hardware, wiring harness, mounting bracket and all components needed for installation.  

  • 100 GPH @ 15-17 PSI (Stock-500HP)
  • Removes Air & Water From Fuel 
  • Increased Horsepower & Torque 
  • Optimized Engine Performance 
  • Improved Throttle Response 
  • Increased Fuel Economy 
  • Lifetime Limited Express Warranty


  • MFG. Number A4SPBD002
  • Manufacturer Name AirDog by PureFlow
  • Shipping Weight 27.00 lb.
  • Shipping Length 19 in.
  • Shipping Width 13 in.
  • Shipping Height 7 in.
  • Fuel Type Diesel
  • EO Number D-595-3
  • UPC 813094015023
  • Warranty Yes
  • Warranty Info Limited Lifetime


Currently Viewing Reviews with a rating of 5. Click here to reset.
★★★★★ ★★★★★
4.1/5 Stars out of 10 Reviews
(Washington st) | September 10th, 2008
This thing is worth every penny! It gave me a huge increase in power & actually allows me to run my edge tuner at levels 4 & 5. Previous to this pump the high power tuner levels made no differance in power, but now she throws you back in the seat! I'll probably be shopping for a new clutch here soon. I actually did get an increase in econimy out of it as well (when I'm not romping on it). My idle is rock solid when it used to fluctuate up & down. During extended low speed driving while scouting / road hunting in the mountains I got an honest 2 to 3 mpg increase! Pretty easy to install except for the fuel tank pickup tube. Rather difficult to remove & re-install the 34 gal tank by yourself on my 05 2500 but it can be done. Great product!!
Definitely Worth it
(illinois) | October 16th, 2010
I go this and installed myself and wow wasn't expecting much from it but big improvement on throttle response and my Mpg seen a 2+ mpg increase I installed a AEM Brute Force intake and Silverline exhaust and seen nothing on them but the AirDog big Difference Well worth the money.
Great product! Immediate Difference!
(Bedford TX) | December 10th, 2010
I have the early 2004 2500 Dodge 4X4. This is a Great product and easy install (I did not have the intank pump though and as such did not have to drop the fuel tanks). At first startup, I noticed my engine was quieter and smoother sounding (as I remembered it when it was new). I took it for a spin and the throtle was tons more responsive. After driving it for a couple of weeks, I also noticed an increase in my mileage by about 2 to 3 miles per gallon.
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Questions and Answers

Does this replace the stock lift pump either engine compartment mounted or in-tank (2004 Dodge 5.9) I want a system to replace the stock lift pump and filter system
View Staff Answer 

Yes, your stock lift pump and fuel filter will be replaced regardless of you stock lift pump location.

Is this a good apliction to replace the factory lift pump? Where does this unit mount and is this a complete kit with fittings?
View Staff Answer 

The PureFlow AirDog 100 Air/Fuel Separation System is a great replacement of your factory lift pump. The pump is mounted to your frame rail with the supplied mounting hardware and ships complete with a full installation kit. For more information, give our Diesel Experts a call at 1-888-DIESEL4!

Can I remove my stock fuel filter or should I leave it in?
View Staff Answer 

You stock fuel filter can be left as a secondary filter or removed completely.

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