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596 owner reviews on Amazon
Availability checked 2026-09-19 · current price shown on Amazon
Need used or OEM instead? Salvage and take-off fuel system for this fitment turn up on eBay Motors.
Sinister Diesel Blue Spring Kit with Billet Spring Housing - Fuel Regulator Kit - 2003-2007 Ford Blue Spring Kit 6.0 Powerstroke – Fast Install – Replace OE # 3C3Z-9T517-AG 3C3Z9T517AG. Fuel-system hardware to keep the Power Stroke fed reliably at stock and elevated power.
Best for: Reliable fueling at stock or elevated power
Where this part comes up in our Power Stroke roundups, top lists, and buying guides:
Why the 6.7 Power Stroke CP4.2 pump grenades, how to protect against it, and the real fixes — disaster-prevention kits, DCR pump conversions, filtration upgrades, and used/OEM options — for 2011-2024 Ford Super Duty diesels.
Read the guide GuideA plain-English comparison of the 7.3, 6.0, and 6.7 Power Stroke — power characteristics, known weak points, cost and ease of ownership, and a decision framework for which engine fits your budget and use case.
Read the guide GuideA complete Power Stroke injector reference — how each engine fires its injectors (HEUI vs common-rail), the symptoms of a failing injector, fitment by engine and year, and the fuel-system parts that make injectors last. New on Amazon Automotive, reman and OEM on eBay Motors.
Read the guide GuideThe complete Power Stroke fuel filter reference — correct filters and Motorcraft part numbers for the 7.3L, 6.0L, 6.4L, and 6.7L, honest change intervals, symptoms of a clogged filter, water-in-fuel warnings, and the reliability conversion kits worth running — with new (Amazon) and OEM/used (eBay Motors) sourcing.
Read the guide GuideThe complete Ford Power Stroke fuel filter reference — which filter fits the 7.3, 6.0, 6.4, and 6.7L diesel, the correct Motorcraft FD-4616 / FD-4615 / FD-4625 and Doc's Diesel cross-references, the 2016-to-2017 6.7L split, change intervals, overdue-filter symptoms, the 6.7 plastic housing fix, and where to buy new (Amazon) or used/OEM housings (eBay Motors).
Read the guide GuideHow to choose a tuner or programmer for your Ford Power Stroke — canned handheld tunes vs. custom tuning, the EGT and transmission-temp limits that keep a tune safe, the supporting mods a tune actually needs, and fitment by engine. New support parts on Amazon Automotive; used SCT, Edge, H&S and unlock cables on eBay Motors.
Read the guide
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Sinister Diesel Blue Spring Kit with Billet Spring Housing - Fuel Regulator Kit - 2003-2007 Ford Blue Spring Kit 6.0 Powerstroke – Fast Install – Replace OE # 3C3Z-9T517-AG 3C3Z9T517AG
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