Description
Overview
The FASS Titanium Signature Series Plus Fuel System is the next evolution of the popular Titanium Signature Series, purpose-built for the 2020-2023 GM Duramax 6.6L. Engineered by FASS Fuel Systems to be a top-performing, long-lasting, and reliable aftermarket lift pump and filtration system, it delivers clean, air-free diesel to your injection system so your truck runs the way it should. Rated at 140 gallons per hour, this dedicated fuel system supports your GMC/Chevrolet Duramax 6.6L for up to 500 HP, making it an ideal upgrade for stock trucks and modified builds alike.
Why the “Plus” Matters
What sets the Titanium Signature Series Plus apart is a cleaner, more refined installation. It comes equipped with ORB (O-Ring Boss) fittings, 6061 aluminum black anodized fittings, and black fuel line for an ultra-clean, professional-looking setup under the hood and along the frame. The pump body itself is crafted from durable 6061 T-6 billet aluminum in a black finish, giving it the strength and corrosion resistance demanded of a hard-working diesel fuel system.
Advanced Filtration & Protection
Duramax diesel engines are known for fuel-related injector failure issues, and FASS filtration systems are designed to eliminate the problems that stem from contaminated or aerated fuel. The Titanium Signature Series Plus offers an improved 2-micron filtration rating, a built-in water separation filter, and the patented FASS air/vapor removal process. Together, these advanced filtration benefits help protect your Duramax injection system, extend the life of both the injection system and injectors, and keep your fuel clean, dry, and free of damaging air and vapor.
Key Highlights
- Titanium Signature Series Plus by FASS Fuel Systems — the next evolution of the Signature Series
- Rated at 140 gallons per hour, supporting up to 500 HP on the Duramax 6.6L
- 2-micron filtration with a built-in water separation filter
- Patented FASS air/vapor removal process for cleaner, air-free fuel
- ORB (O-Ring Boss) fittings, black anodized 6061 aluminum fittings, and black fuel line for an ultra-clean install
- Durable 6061 T-6 billet aluminum body in black; backed by a limited lifetime warranty
Fitment
This dedicated fuel system is engineered for 2020-2023 Duramax Truck/SUV applications powered by the GM 6.6L diesel. Sold as each, it delivers a reliable, filtration-focused fuel supply upgrade tailored specifically to the late-model Duramax platform.
If you want to defend your injectors, maximize fuel quality, and support power levels up to 500 HP with a clean, purpose-built installation, the FASS Titanium Signature Series Plus is the answer for your 2020-2023 Duramax 6.6L.









