The Racor PFF4616 ParFit Fuel Filter Kit is the genuine original equipment manufacturer (OEM) replacement fuel filtration set engineered specifically for 2003–2007 Ford Super Duty trucks and Excursions equipped with the 6.0L Powerstroke diesel engine. Manufactured by Parker Racor—the original tier-1 supplier to Ford and Navistar—this two-stage filter kit provides complete hydraulic and particulate protection by pairing a 10-micron primary water-separating element with a 2-micron secondary final filter to shield sensitive HEUI fuel injectors from abrasive contaminants, asphaltites, and emulsified water.

Quick Specs & Kit Inclusions

• Filtration Configuration: Complete two-stage system (primary chassis HFCM element + secondary engine-mounted final filter)
• Primary Element Rating: 10-micron nominal rating featuring patented Aquabloc water-coalescing media and alignment retention tabs
• Secondary Element Rating: 2-micron absolute rating engineered to capture ultra-fine particulate before the fuel supply rails
• Flow & Pressure Rating: Rated for 34 GPH maximum flow at up to 58 PSI operating pressure
• OEM Supplier Pedigree: Manufactured directly by Parker Racor (identical to Motorcraft FD-4616 without dealer markup)
• Emissions Status: 50-state legal (direct mechanical replacement)
• Direct Interchange Part Numbers: Motorcraft FD-4616, Motorcraft FD-4604, Ford 3C3Z-9N184-CA, Ford 3C3Z-9N184-CB, Navistar 1843057C92
• What's in the Box: (1) 10-Micron Primary Fuel/Water Separator Element with O-ring, and (1) 2-Micron Secondary Engine Valley Fuel Filter Element with O-ring

Problem Solved: Curing Premature Injector Failure & Filter Bypass

Low-cost aftermarket "will-fit" fuel filters frequently skip the patented features engineered into the factory Racor filtration system. Inferior primary filters lack the critical alignment locator tabs, allowing unaligned elements to collapse or bypass unfiltered fuel and water straight past the Horizontal Fuel Conditioning Module (HFCM). Furthermore, generic secondary filters often utilize sub-par 10-to-20 micron paper media instead of true 2-micron depth filtration. On 6.0L Powerstroke HEUI injectors—where internal spool valve tolerances are measured in micro-inches—fine abrasive debris causes stiction, injector scoring, erratic idle, and costly injector failure. The Racor PFF4616 delivers verified 99% water separation and 99% particulate removal, maintaining proper fuel pressure and preventing fuel aeration.

Fitment

• 2003–2007 Ford F-250 Super Duty 6.0L Powerstroke Turbo Diesel
• 2003–2007 Ford F-350 Super Duty 6.0L Powerstroke Turbo Diesel
• 2003–2007 Ford F-450 Super Duty 6.0L Powerstroke Turbo Diesel
• 2003–2007 Ford F-550 Super Duty 6.0L Powerstroke Turbo Diesel
• 2003–2005 Ford Excursion 6.0L Powerstroke Turbo Diesel
• Fitment Note: Engineered for F-Series pickup, chassis cab, and Excursion platforms; does not fit Econoline E-Series vans (which require PFF4606).

Safety & Primary HFCM Draining: Park the vehicle on level ground and switch off the ignition. Position a drain pan beneath the HFCM mounted to the inside driver-side frame rail. Open the 6mm Allen or aftermarket thumb drain plug and allow all accumulated water and diesel to drain completely. Primary Filter Removal: Using a 36mm or 1-7/16" socket, unscrew the HFCM primary filter cap counter-clockwise. Pull the cap and old 10-micron element out of the housing. Detach the old filter element from the cap and discard along with the old cap O-ring. Primary Filter Installation: Clean the cap threads and inside of the HFCM bowl with clean shop towels. Lightly coat the new primary cap O-ring with clean diesel fuel or clean engine oil and install it into the cap groove. Snap the new Racor 10-micron element into the cap, aligning the keyed locator tabs. Thread the cap assembly into the HFCM housing and torque to 19 ft-lbs (25 Nm) using a 36mm socket. Secondary Filter Removal: Move to the engine bay. Using a 24mm or 15/16" socket, slowly unscrew the secondary fuel filter cap on top of the engine valley fuel bowl. Lift the cap and old 2-micron filter element out. Remove the old element and cap O-ring. Secondary Housing Inspection: Inspect the secondary bowl reservoir; suction out any settled debris or residual fuel with a clean fluid syringe. Clean the cap threads thoroughly. Secondary Filter Installation: Install the new cap O-ring into the cap channel, lubricating it with clean diesel fuel. Snap the new Racor 2-micron element into the cap. Hand-thread the cap onto the secondary housing to prevent cross-threading. Torque the secondary cap to 19 ft-lbs (25 Nm) using a 24mm socket. Fuel System Priming Sequence: Turn the ignition key to the "RUN" position for 30 seconds without cranking the engine to allow the electric lift pump to fill the HFCM, purge air through the secondary regulator, and pressurize the fuel rails. Turn the key off for 5 seconds. Repeat this key cycle 4 to 5 times. Final Leak Check: Start the engine and inspect both the frame-rail HFCM cap and the engine-mounted secondary fuel bowl cap for zero fuel weeping.