If you’re shopping for a
FASS Diesel Fuel System, you’ve probably noticed two of our most popular product lines: the
Titanium Signature Series and the
Titanium Signature Series PLUS.
Both deliver the same unmatched performance, filtration, and reliability — but there’s one key difference in their construction and fittings.
Titanium Signature Series
The standard Titanium Signature Series Fuel System is the foundation of the FASS lineup. It’s built for durability and precision, featuring:
- Brass pipe thread fittings
- The same FASS air/vapor separation and 2-micron filtration technology
- Flow rates from 100GPH up to 290GPH for stock to extreme-performance builds
This setup delivers dependable, long-lasting performance that’s ideal for most diesel truck owners — from daily drivers to heavy haulers.
Titanium Signature Series PLUS
The Titanium Signature Series PLUS takes the same trusted system and upgrades the fittings to premium black O-ring boss (ORB) fittings. These fittings provide:
- A cleaner, more streamlined appearance
- Improved sealing under higher pressure
- Easier installation and servicing
Functionally, both systems perform the same — but the PLUS version offers an aesthetic and hardware upgrade for those who want the best finish and fit available.
The No-Drop Versions
The same difference applies to our No-Drop versions, which include the FASS Single-Bolt Sump Kit for quick, drill-in installation without dropping the tank.
- No-Drop Titanium Signature Series: brass pipe thread fittings
- No-Drop Titanium Signature Series PLUS: black ORB fittings
Both provide the same efficient fuel delivery, filtration, and sump-based design — the difference comes down to hardware style and preference.
The Bottom Line
Whether you choose the
Titanium Signature Series or the
Titanium Signature Series PLUS, you’re getting industry-leading filtration, air separation, and performance.
The PLUS version simply adds upgraded black O-ring boss fittings, giving your installation a professional finish with enhanced durability. Both options are backed by the same FASS reliability and Limited Lifetime Warranty.
