FASS DIFSFRD1001 Drop-In Series Fuel Filter System

Please Note: THIS IS NOT A LIFT PUMP! This is an air separation/filtration system that utilizes your factory lift pump.

Please Note: If you have a S&B or Titan Fuel Tank, you will need to purchase our adapter kit PN. DIFSFRDTANKSPCR.

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 compatiblewith our Fuel Sump Kit. This plug-and-play filtration system retains the Powerstroke OEM in-tank fuel pump.

The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the Ford 6.7L Powerstroke. Backed by our limited lifetime warranty, the Drop-In Series Fuel System protects your Ford 6.7L Powerstroke from the issues caused by fuel contamination.

If you drive a Ford with a Powerstroke 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.

Reliability, Simplicity, Protection

• Supports Stock & Modified Powerstroke: Plenty of fuel for stock and modified Fords.
• 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% 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: Extends injection system life 3x
• 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%

Key Features

• The only drop‑in 6.7L filtration system that retains functionality of the OEM water‑in‑fuel light via WIF sensor.
• The only drop‑in 6.7L Powerstroke filtration system with air separation!
• 100% 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% 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” fuel line to replace OEM feed line from tank.
• 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.