FASS Drop-In Series Diesel Fuel System for 2003–2007 RAM 5.9L Cummins (DIFSRAM2001)

FASS Drop-In Series Diesel Fuel System for 2003–2007 RAM 5.9L Cummins (DIFSRAM2001)

Protect your 5.9L Cummins and boost performance with the most advanced drop-in diesel fuel filtration system—engineered for reliability, efficiency, and easy installation.

Vehicle Fitment:

• 2003–2007 RAM 2500 & 3500 with 5.9L Cummins
  Must have an in-tank lift pump. 2003–2004.5 models must be retrofitted with an in-tank pump to be compatible.

Key Features:

• True Plug-and-Play Installation – No cutting, wiring, or tuning required.
• Retains OEM In-Tank Fuel Pump – Seamless integration with factory components.
• Extreme Water Separation – Removes over 99% of water and contaminants.
• 2 Micron Absolute Filtration – Industry-leading protection for your injection system.
• Air & Vapor Separation – Increases fuel lubricity by up to 10%.
• Performance Radius Cuts (PRC) – Enhances fuel flow and prevents air reintroduction.
• Water-In-Fuel Sensor Compatible – Retains full OEM sensor functionality.
• Cold Weather Ready – Optional electric heater available.

Horsepower Compatibility:

• Stock to 600 HP
• 600–900 HP
• 900–1200 HP
• 1200–1500 HP

Whether your Cummins is stock or built for performance, this system delivers clean, consistent fuel flow to support your power goals.

Performance Benefits:

• Prevents Costly Injector Damage – Filters out water, air, and debris before it reaches your fuel system.
• Restores Horsepower & Throttle Response – Cleaner fuel = better combustion.
• Improves Fuel Economy – Optimized combustion efficiency (results may vary).
• No Tune Required – Works with stock or tuned trucks without triggering codes.
• Backed by FASS Limited Lifetime Warranty – Built to last.

Important Notes:

• Not compatible with FASS Fuel Sump Kit.
• Cab & Chassis models may require modifications.
• Requires filters: XWS3002XL & CWS1010.
• 2003–2004.5 trucks must have an in-tank lift pump retrofit.

Easy DIY Installation:

Install in under an hour with basic tools—perfect for weekend warriors and diesel pros alike.

Upgrade your 5.9L Cummins with the FASS Drop-In Series Diesel Fuel System—trusted by diesel owners for unmatched filtration, performance, and peace of mind.

Order now and experience the FASS difference!