FASS Diesel Fuel Systems are engineered, manufactured, and assembled in the U.S.A., and we wouldn’t have it any other way. For our team, diesel performance isn’t just about accessories, it’s a way of life–as is the reliability of an American made product.
FASS Diesel Fuel Systems provide 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.
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.