FASS Drop-In Series Diesel Fuel System (2025-2027 6.7L Cummins) - Southern Diesel Supply
FASS Drop-In Series Diesel Fuel System (2025-2027 6.7L Cummins) - Southern Diesel Supply
FASS Drop-In Series Diesel Fuel System (2025-2027 6.7L Cummins) - Southern Diesel Supply
Part #: DIFSRAM5001

FASS Drop-In Series Diesel Fuel System (2025-2027 6.7L Cummins)

Sale price$479.99 Regular price$509.99

Fits: Cummins 6.7L (2019-Current Cummins)

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Part: FASS Drop-In Series Diesel Fuel System (2025-2027 6.7L Cummins)
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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 Drop-In Series Diesel Fuel System (2025-2027 6.7L Cummins) you will earn 480 DIESEL DOLLARS in your SDS Fuel Tank!

FASS Drop-In Series Fuel System – For 2025 to 2027 RAM 2500/3500 6.7L Cummins

New for 2025+: The FASS Drop-In Series is now available for the 2025-2027 RAM 2500 and 3500 with the 6.7L Cummins (24V). This bolt-in, plug-and-play filtration system replaces the factory engine fuel filter and retains the OEM in-tank lift pump.

Please Note: THIS IS NOT A LIFT PUMP! This is an air separation/filtration system that utilizes your factory lift pump. Installation of this kit on a cab and chassis may require modifications. Drop-In Fuel Systems are a plug-and-play filtration upgrade and are not compatible with our Fuel Sump Kit. No additional items are needed for installation.

The FASS Drop-In Series Diesel Fuel System was engineered by FASS to protect your 6.7L Cummins from the issues caused by fuel contamination. Backed by FASS's limited lifetime warranty (with registration), it delivers cleaner fuel and better water separation while reducing the ongoing cost of maintenance.

Reliability, Simplicity, Protection

  • Reduces Maintenance Costs: Can pay for itself compared to buying OEM Ram filters over time.
  • Injector Protection: FASS says it will triple the life of your fuel injection system.
  • FASS Filtration: Optimizes MPG (results vary).
  • Bolt-In Installation: Drop-In Series design, no additional items needed.
  • Cold Weather Ready: Compatible with FASS Drop-In Electric Fuel Heater Kits (sold separately).

Advanced Filtration

  • XWS3002XL Extreme Water Separator: 2 micron absolute, microglass media, 25 GPM.
  • CWS1010 Water Separator / Fuel Filter
  • Air/Vapor Removal: Patented FASS process.

Vehicle Fitment

  • 2025 RAM 2500/3500 – 6.7L Cummins (24V)
  • 2026 RAM 2500/3500 – 6.7L Cummins (24V)
  • 2027 RAM 2500/3500 – 6.7L Cummins (24V)

Related add-ons: FASS Drop-In Electric Fuel Heater Kit (DIFSHK1001 / DIFSHK1001D) for cold-weather operation, and the FASS Connect Monitoring System.

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