Airdog vs Fass: The Lift Pump Debate

We see and get asked this question on a daily basis, and it's the simple "Which lift pump is better Fass or Airdog." 

I will start off by saying that either one will get the job done and has proven to be efficient over the years and will only continue to improve. I will get into the little details of each and let you decide, but again both are great products with a lifetime warranty on the pumps for the original purchaser. 

We'll be comparing the new Airdog II 4G and the Fass Signature Titanium Series pumps as these are the newest pumps for each company! 

Airdog- https://www.injectedmotorsports.com/products/brand/airdog

• Brushless Gerotor motor; longer motor head (low amperage)
• Adjustable pressure regulator
• Quick connect line fittings
• Bolt-on mounting bracket
• Self-priming for easier start-ups
• Demand Flow Fuel Return
• Typically doesn't require a sump (especially on the 15-16 LML Duramax models)
• Lifetime warranty (if purchased at MAP price and from an authorized reseller) *amazon/eBay are not considered authorized
• 25 years in business with the original lift pump design and USA MADE

Fass- https://www.injectedmotorsports.com/products/brand/fass

• 2-micron filters with the new water separator design to trap the water instead of having a drain
• 2% failure rate on all pumps and has designed the new "FASS Whisper Technology" to make the pumps less noisy. Fass claims they did this without lowering the flow as Airdog and others do
• Fass provides the heater kits for cold climate vehicles
• Has radius cutting feature that prevents stagnant fuel pockets from forming at 90-degree bends
• Bolt-On brackets
• 19 years in business and USA MADE
• Lifetime warranty (if purchased at MAP price and from an authorized reseller) *amazon/eBay are not considered authorized
• 30,000 Mile Filter life

When comparing the two here's our opinion on key areas:

Filters

• Fass (Their new filters are a little better in terms of filtration and the new water separator is better than the drain style) 

Mounting

• Airdog (Their mounting system and hardware are more flexible and it hides the pumps better and doesn't allow them to hang as low as the fass systems do)

R&D

• The slight edge here to Fass just because they tend to do a little more testing on their pumps, but Airdog has proven for years to be just as effective

Motor

• The slight edge here to Airdog as their 4G motors have been out longer and have proven to be a great quiet motor with a very small failure rate

Warranty 

• Both offer a lifetime warranty to the original purchaser (bought from an authorized dealer and at MAP price)

Hardware/fitting

• Both provide the hardware and fittings, and to us, both will get the job done

Price 

• Both are about the same price with Fass being a hair cheaper 

Install/instructions

• Give it to the airdog here slightly as sometimes the Fass guides can be vague and miss important details

Overall:

The winner will largely depend on the end-user experience, whether that be customer service, tech support, price, features, and so on. Both will get the job done, and both will work with you to provide the best product. 

Hunter's take, "I prefer the Airdog slightly over the Fass on the Duramax trucks because of the better mounting system and the motor design. Filters can be changed out as both have cross-filter reference guides. Hope this helps some as it's just a simple breakdown between the 2 great American Companies!"

Hunter Holdridge- Owner