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.
A product is only as good as its components. And you can bet that FASS Diesel Fuel Systems are made with the highest quality, American Made materials.
Each FASS is individually tested for quality assurance, ensuring that you receive the most dependable product.
Designed to outlast and outperform all the rest, and engineered with real-world experience.
Assembled in Marthasville, MO by small-town folks who take pride in their work and proudly run FASS on their own trucks.