Benefits of FASS (Fuel Air Separation System) Removes Air / Vapor from Fuel Consistent Flow of Fuel  Reliable High Volume Pumps Increase Horsepower Increase Torque Increase Fuel Economy 13,000-15,000 Hour Life Expectancy That Equates to 500,000 Plus Miles Up to 260 GPH 160 Max PSI Interchangeable Filters Lifetime Warranty

But what's the point of removing entrained air from diesel fuel?
Diesel engines and fuel systems are designed on a test bench in optimum conditions.  However, our trucks are obviously RARELY used in optimum conditions.  We drive on rough roads with varying speeds and RPM's in different climates, barometric pressures, and humidity.  All of these factors lead to great amounts of air and vapors being accumulated into our fuel tank, fuel lines, etc.  Entrained air in the fuel system can create any or all of the following symptoms:

• Low Horsepower
• Low Fuel Mileage / Poor Fuel Mileage
• Excessive Smoke
• Injector Failure
• Hard Start or Will Not Start
• Engine Surges at Low Idle
• Warm Engine Runs Rough or Misfires in Operating Range
• Rough Idle
• Engine Will Not Reach Rated Speed When Loaded

FASS Semi Truck Configurations:

• Titanium Series is the same as the old FASS 95 Series which has a new, smaller, more compact set-up with smaller filters. Filter life is about 1/3 to 1/2 that of the HD Series filters.
• HD Series is the same as the old FASS 150 Series which is the same FASS system that we have been selling for quite some time. Uses the same filters as before.

FASS Semi Truck Flow Rates:
The vast majority of unmodified Class 8 semi trucks will operate perfectly with the 150gph HD 150G model. Modified vehicles may require the higher flow rates of our HD 220G or our HD 260G models. Other specific fuel rates are also available. Contact us for more information.

* NOTE Class 8 semi trucks with stock Caterpillar C16 or stock Cummins ISX Signature 600 engines will require the 220gph flow rate of the HD 220G model.

* UIM NOTE Class 8 semi trucks with Unit Injected Mechanical (UIM) fuel systems require an additional oil pressure switch (part number 78143) for proper operation. The 78143 is listed on our Miscellaneous Accessories page.

* NOTE All Class 8 FASS systems require fuel line kits for installation. Please visit our Fuel Line Kits page for fitment options,Click here.

* NOTE You do not want to run a pump with a higher gallon per hour rating than your engines horsepower or the life of the FASS fuel pump will be greatly reduced. Pump noise is greatly enhanced with the larger flowing pumps.

* NOTE  All FASS Fuel Air Separator Systems and the High Performance Fuel Pump systems are complete kits. They come with the hoses, fittings, mounting hardware, etc to do the job. Everything needed to complete the install should be included, except tools and wire ties. 

Ordering Replacement Fuel Filters and Water Separators

This is a a great time to grab a few replacement filters with your new FASS system. Below you can add an extra Water Separator/Fuel Filter. It is always recommended that you keep a spare filter in your truck at all times. The fuel filter requires changing about every 12k-15k miles.  Save money by ordering extra filters/ separators with your kit. We give you a small discount and free shipping when purchased with your new FASS. The 3 Micron Fuel filter is included in the options below, is part number FF-1003. If you prefer the 10 micron version, just give us a call. The replacement water separator  part number is FS-1001. The water separators don't usually go bad, but can get hurt from wear and tear. It is a good idea to have a spare on just in case.