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.