Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the FASS Titanium Signature Series Fuel System (2020-2023 6.6L Duramax) you will earn 800 DIESEL DOLLARS in your SDS Fuel Tank!
FASS Titanium Signature Series Fuel System for GMC/Chevrolet 2020-2023 Duramax 6.6L
Please Note: This Fuel System REQUIRES aftermarket tuning to be compatible.
If you drive a 2020–2023 GMC/Chevrolet with the Duramax diesel engine, upgrading your fuel filtration and delivery will triple the life of the injection system, increase MPG & power, provide exceptional extreme cold weather operations, and more.
That’s exactly why we engineered the Titanium Signature Series Fuel System—to outlast and outperform anything else on the market. This Fuel System is designed to provide the purest possible fuel to your Duramax and built to outlast it.
Peace of Mind, Efficiency, Power
Supports Stock & Modified Duramax:Plenty of fuel for stock and modified GM/Chevy.
Injector Protection:Will triple the life of your injectors and injection pump.
Limited Lifetime Warranty:Register your FASS system, and you’re covered.
Advanced Filtration Technology
FASS doesn’t just move fuel – we filter it better than anyone:
Water Separation:3rd‑party proven to eliminate over 99% of water.
Air/Vapor Removal:Eliminates entrained air and vapor that damages injection systems and reduces power and efficiency.
2 Micron Absolute Filtration – Microglass:Removes debris smaller than OEM filters can catch.
Mass Flow Return (MFR):Constantly “polishes” your diesel by sending unused fuel back through the filters, so your tank always holds clean, conditioned fuel.
Key Benefits
Improves Reliability:Triples injection system life
Maximized Horsepower:Stronger throttle response, improved fuel atomization, restored injection timing, resulting in a more balanced engine.
Optimized MPG:More efficient and complete combustion (results will vary).
Peace of Mind:The Extreme Water Separator acts as a fail‑safe during extreme fuel contamination, preventing thousands of dollars in repairs and downtime.
Extreme Cold Weather Confidence:Dependable starts and operation in extreme cold weather climates, especially when paired with the appropriateFASS Fuel Heater.
Proven Reliability:FASS Fuel Systems have less than a 0.5% failure rate.
Cleaner Operation:Improved fuel quality and combustion reduces DPF regens and soot output.
Improves fuel lubricity at least 10%.
Key Features
Fuel Flow:Supports stock and modified 6.6L Duramax up to 1500 HP (by horsepower selection).
2‑Micron Absolute Filtration:Captures finer debris than OEM filters.
Removes over 99% of water from fuel (3rd‑party verified).
Patented FASS air/vapor removal process.
1,000,000+ mile motor life.
30,000‑mile filter life expectancy.
Limited Lifetime Warranty (with registration).
Optional electric fuel heater kits available.
Mass Flow Return (MFR):Continuously polishes fuel for maximum cleanliness.
Whisper Technology:Industry’s quietest motor.
Performance Radius Cuts (PRC):Smoother internal fuel flow with no sharp restrictions.
Heavy‑duty bolt‑on steel mounting brackets.
Why Choose FASS?
At FASS, we don’t rush products to market—we strive for perfection and settle for excellence. That’s why our systems have a failure rate of less than 0.5%, and why diesel owners across the country trust us to protect their investments.
Whether you’re daily driving yourGMC/ChevroletDuramax or building horsepower, the FASS Titanium Signature Series Fuel System delivers peace of mind and performance you can feel.
