When it comes to keeping a Cummins-powered Ram running strong, reliable fuel delivery is everything. That’s why thousands of 5.9L and 6.7L owners—from daily drivers to high-horsepower weekend warriors—choose a FASS 165GPH Fuel System.

Perfect for 2005-2018 and 2021-2024 Rams, this high-flow system has become the sweet spot for stock trucks and modified builds making up to 900 wheel horsepower.

Let’s break down why 165GPH is such a hot number, and why FASS makes the best version of it.

Built for Big Power and Everyday Reliability

A Cummins loves clean, air-free diesel. The 165 gallon-per-hour rating provides ample fuel for aggressive tunes, larger injectors, and hard-running turbos—yet remains perfectly suited to a stock setup.

That means:

• Consistent fuel pressure under full throttle
• Extra filtration down to 2 microns for maximum injector and pump protection
• Removal of over 99% of entrained air/vapor and water
  
  

Whether you’re towing, commuting, or chasing dyno numbers, the FASS 165GPH System keeps the injection system happy and horsepower flowing.

Multiple Versions to Match Any Build

FASS gives Cummins owners the flexibility to choose exactly what fits their truck and install style:

• Titanium Signature Series — The no-frills FASS 165GPH Fuel System. Includes everything needed to upgrade your Cummins!
• Titanium Signature Series No-Drop – Adds the FASS Fuel Sump Kit (SK5501), eliminating the need to lower the fuel tank during install.
• Titanium Signature Series PLUS – Adds black o-ring boss fittings for the cleanest possible install.
• Titanium Signature Series No-Drop PLUS – The best of both worlds: adds both the FASS Fuel Sump Kit (SK5501) and black o-ring boss fittings.
  
  

All versions share FASS’s legendary filtration, lifetime warranty (with registration), and bulletproof construction.

Perfect Fit for 2005-2018 & 2021-2024 Ram Cummins

From third-gen 5.9s to late-model 6.7s, these trucks have different OEM fuel supply quirks. FASS engineers every kit for a direct, no-guesswork install:

• Model-specific brackets and harnesses
• Factory-style connections and plumbing
• Detailed instructions to save time in the shop or driveway
  
  

Whether you’re working with a daily driver, a towing rig, or a 900-whp build, FASS 165GPH Systems cover the entire range.

Why Diesel Owners Keep Choosing FASS

FASS Diesel Fuel Systems isn’t just a brand—it’s a commitment to better filtration, better performance, and longer injector life. Key advantages include:

• Lifetime limited warranty (with registration)
• Premium U.S.-made components and fittings
• Nationwide dealer and installer network for easy service and support
  
  

That combination of proven power and peace of mind is why Cummins owners keep coming back.

Ready to Feed Your Cummins the Fuel It Deserves?

If you own a 2005-2018 or 2021-2024 Ram Cummins, the FASS 165GPH Fuel System is ready to meet you where you are—stock daily driver or 900-horsepower street monster.

Explore the full lineup of No-Drop, Plus, and No-Drop Plus versions on our FASS Diesel Fuel Systems website and give your truck the clean, consistent fuel it needs to perform at its best.