Titanium Signature Series 140GPH Fuel System

Features:

• 140 GPH flow rating, stock to 700 HP
• 2-micron absolute Microglass filtration
• Removes over 99% of water from fuel
• Patented air and vapor removal process
• Mass Flow Return continuously polishes fuel
• Requires aftermarket tuning for compatibility
• Whisper Technology for quiet operation
• Heavy-duty bolt-on steel mounting brackets
• 30,000 mile filter life expectancy
• Optional electric fuel heater kits available
• Backed by limited lifetime warranty

Give Your Duramax The Fuel Quality It Deserves

Anyone who's dealt with a failed injector on a Duramax knows it's not a cheap lesson, and most of the time contaminated or poorly filtered fuel is the real culprit behind it. The FASS Titanium Signature Series is built to make sure that never happens to your 2020-2023 GMC or Chevrolet Duramax, delivering the cleanest, most consistent fuel supply your engine has ever seen. According to FASS, this system can triple the life of your fuel injection system, which is a serious claim, but it's backed by filtration that removes over 99% of water and captures debris far smaller than what your factory filter can catch. That kind of protection matters whether you're daily driving to the job site or pushing your Duramax toward serious horsepower numbers, since this system supports stock trucks all the way up to 700 horsepower builds. Beyond just protecting your injectors, FASS reports drivers commonly see stronger throttle response and improved fuel economy once combustion cleans up, though results will vary by truck and driving style. It's also engineered to handle extreme cold weather with confidence, especially when paired with one of FASS's optional fuel heater kits for the harshest winter mornings. This is the kind of upgrade that pays for itself the first time it prevents an injector failure, and FASS backs that confidence with a limited lifetime warranty when you register your system.

Precision Filtration Engineering Built Around Real Diesel Demands

The FASS TSC15180F140G Titanium Signature Series is a 140 GPH fuel system engineered specifically for 2020-2023 GMC Sierra and Chevrolet Silverado 2500HD and 3500HD trucks equipped with the 6.6L Duramax engine, and it requires aftermarket tuning to operate correctly. At the core of the system is 2-micron absolute Microglass filtration, which according to FASS removes debris smaller than OEM filtration can catch while also achieving third-party verified removal of over 99% of water from the fuel supply. The system also incorporates FASS's patented air and vapor removal process, addressing entrained air that can damage injection components and rob both power and efficiency if left unaddressed. Mass Flow Return technology continuously cycles unused fuel back through the filtration system, meaning the fuel sitting in your tank stays conditioned and clean rather than degrading over time. Performance Radius Cuts eliminate sharp internal restrictions for smoother fuel flow, while Whisper Technology keeps the pump notably quiet compared to older fuel system designs. The complete system mounts using heavy-duty bolt-on steel brackets and carries an expected filter life of 30,000 miles alongside a rated motor life exceeding 1,000,000 miles. According to FASS, their systems maintain a failure rate below 0.5%, and every Titanium Signature Series system is covered by a limited lifetime warranty once registered with the manufacturer.

Fitment: 2020, 2021, 2022, 2023 GM Sierra/Silverado 2500HD/3500HD Duramax 6.6L

Notes:

• Requires aftermarket tuning to be compatible
• Supports stock trucks up to modified builds rated to 700 HP
• Manufacturer states injector life can be tripled, results may vary
• Fuel economy and power gains are manufacturer estimates, results will vary
• Pair with a FASS fuel heater kit for extreme cold weather use
• Filter life expectancy is approximately 30,000 miles
• Limited lifetime warranty requires product registration
• Manufacturer reports a failure rate below 0.5%

Install Instructions