• Increased Fuel Economy
    Save Your Injectors
    Increase Horsepower & Torque

How it Works

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FASS Diesel Fuel Systems.

FASS Diesel Fuel Systems are the number one preferred Fuel Air Separation System selected for use by Pickup and Class 8 owners the world over. FASS Systems are designed to eliminate Air & Vapor trapped in diesel fuel. Our Titanium Signature Series is the most versatile FASS System ever made, and it provides your engine with the cleanest burning fuel possible. Delivering purified fuel without Air & Vapor increases lubricity, which provides extended injector life and maximizes the performance of your engine. FASS products are designed, manufactured, and assembled right here in the United States and we pride ourselves on providing a superior product and amazing customer service. To learn more about our diesel fuel filters, diesel fuel pump, or to just find your local FASS fuel system dealers contact us today!


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FASS Craftsmanship

FASS Diesel Fuel Systems are engineered, manufactured, and assembled in the U.S.A., and we wouldn’t have it any other way. Diesel Performance Products aren’t just an accessory; they are a way of life; As is the reliability of an American Made product. FASS provides the cleanest fuel to the vehicles powering the infrastructure of our great nation, whether it’s a Class 8 Semi hauling Pittsburgh Steel or a Diesel Pickup in cattle country, FASS is built to last. Constructed from 6061 T-6 Aircraft Quality Aluminum, and boasting such proprietary features as FASS Silencing Technology (FST), Performance Radius Cuts (PRC), and Mass Flow Return (MFR), FASS is truly a step above the rest, in both cutting edge technology and quality.

Research & Development


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This Product has NO WARRANTY unless:


  1. It has been purchased from an Authorized or VIP Fass Dealer- if in doubt check http://fassride.com/locate.php. (If your purchase was made on Amazon.com or Jet.com, the warranty is void. Return the FASS product to the seller and get a refund)
  2. It is registered within thirty (30) days of purchase. Other conditions may apply, please see full warranty information.                                                                                  NOTE: Warranty is void if the product was purchased below FASS website advertised pricing.


Installing a FASS Fuel System DOES NOT Void Manufacturer's Warranty!