The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the 6.7L Cummins. Backed by our limited lifetime warranty, the Drop-In Series Fuel System protects your 6.7L Cummins from the issues caused by fuel contamination.
If you drive a Ram with a Cummins diesel engine and want better fuel filtration, improved reliability, and injector protection without adding an external frame-mounted pump, the FASS Drop-In Series Fuel System is the perfect solution.
Designed as a direct replacement for the factory engine fuel filter, the Drop-In Series delivers cleaner fuel, better water separation, and consistent fuel supply while retaining a factory-style installation.
Please Note: This is not A Lift pump! This is an air separation/filtration system that utilizes your factory lift pump.
Please Note: 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. This plug-and-play filtration system retains the Cummins OEM in-tank fuel pump.
Key Features:
- Reliability, Simplicity, Protection
- Supports Stock and Modified Cummins: Plenty of fuel for stock and modified Rams
- Injector Protection: Will triple the life of your injectors and injection pump
- FASS Filtration: Optimizes combustion, restores HP, maximizing MPG (results vary)
- Limited Lifetime Warranty: Register your FASS system, and you're covered
Advanced Filtration Technology:
- Water Separation: 3rd-party proven to eliminate over 99 Percent of water
- Air/Vapor Removal: Eliminates entrained air and vapor that damages injection systems and reduces power/efficiency
- 2 Micron Absolute Filtration - Microglass: Removes debris smaller than OEM filters can catch
Key Benefits:
- Improves Reliability: Triples the injection system life
- Maximized Horsepower: Improved fuel atomization, restored injection timing
- Optimized MPG: More efficient/complete combustion (results may vary)
- Peace of Mind: The Extreme Water Separator acts as a fail?safe
- Extreme Cold Weather Confidence: Dependable starts and operation in extreme cold weather
- Cleaner Operation: Reduces DPF regens and soot output
- Improves fuel lubricity at least 10 Percent
Key Features:
- The only drop?in 5.9L and 6.7L filtration system that retains functionality of the OEM water?in?fuel light via WIF sensor. The only drop?in 6.7L Cummins filtration system with air separation!
- 100 Percent drop?in, no additional modifications needed. Retains the factory in?tank lift pump.
- Performance Radius Cuts (PRC): Smoother internal fuel flow. 2?micron absolute filtration rating: Captures finer debris than OEM filters.
- Removes over 99 Percent of water (3rd?party verified). Patented FASS air/vapor removal process.
- Bypasses OEM engine?mounted filter and rear?mounted filter (if equipped) reducing maintenance cost. Supplied with 3/8 Inch fuel line to replace OEM feed line from tank to CP3.
- Heater options available for cold weather reliability. Limited Lifetime Warranty (with registration).
Why Choose FASS:
At FASS, we design fuel systems with longevity, reliability, and real?world use in mind. The Drop?In Series is engineered for diesel owners who want proven filtration technology and injector protection-without changing the character of their truck.
Vehicle Fitment by Year:
- 2019 RAM 2500/3500 - 6.7L Cummins
- 2020 RAM 2500/3500 - 6.7L Cummins
- 2021 RAM 2500/3500 - 6.7L Cummins
- 2022 RAM 2500/3500 - 6.7L Cummins
- 2023 RAM 2500/3500 - 6.7L Cummins
- 2024 RAM 2500/3500 - 6.7L Cummins
Part Number: DIFSRAM4001
Details:
- Fits: 2019-2024 Dodge
- Fuel Type: Diesel
- Engine Years: 2019-2024
- Engine Manufacturer: Cummins
- Liter: 6.7 Liter
- Series: Drop-In Series
- Warranty: Limited Lifetime Warranty