Sinister Diesel Remanufactured Fuel Injector Set – 6.0L Powerstroke (Early Build 2003–2004)
Fits 2003–2004 Ford F-250 / F-350 / F-450 / F-550 Super Duty & Excursion with 6.0L Powerstroke (Built Before 9/23/03)
Note: Due to high demand, please allow approximately 2–3 weeks for your injectors to be built, tested, and ready to ship.
Key Features
• Remanufactured OEM injector bodies for cost-effective reliability
• All-new injector coils, electrical connectors, and harness assemblies
• Redesigned spool valve eliminates common 6.0L stiction issues
• Improved cold-weather performance and injector response
• 100% leak, flow, and balance tested for consistent operation
• Sold as a complete set of 8 injectors
• 2-year unlimited mileage warranty
Product Overview
Fuel delivery precision is critical to the performance and longevity of your 6.0L Powerstroke engine. The Sinister Diesel Remanufactured Fuel Injector Set is designed to restore that precision while improving reliability over the factory design.
These injectors use OEM remanufactured bodies for cost savings but feature all-new internal components, including injector coils, connectors, harness assemblies, and a redesigned spool valve. The updated spool valve design prevents stiction — a common issue with factory injectors — for smoother cold starts, improved throttle response, and more consistent performance.
Each injector is thoroughly inspected, rebuilt, and tested to meet or exceed OEM performance standards. Precision flow balancing ensures even fueling across all eight cylinders, resulting in smooth idle, better power delivery, and improved fuel efficiency.
All injectors are sold as a matched set of eight and include a 2-year unlimited mileage warranty. A refundable core charge applies — you can either send your cores first or pay the core charge upfront and receive credit once your old injectors are returned within 30 days.
What’s Included
• (8) Sinister Diesel Remanufactured Injectors for 2003–2004 6.0L Powerstroke (Early Build)
• New injector coils and harness assemblies
• New electrical connectors
• Redesigned spool valves
• 2-year unlimited mileage warranty
Q&A
Q: Are these injectors direct OEM replacements?
A: Yes. These injectors are a direct-fit replacement for factory injectors and require no tuning or modification for installation.
Q: What does “early build” mean?
A: Early-build 6.0L Powerstroke engines were produced before 9/23/03 and use a slightly different injector design than later models. These injectors are built specifically for that version.
Q: Do these injectors fix stiction issues?
A: Yes. Each injector includes a redesigned spool valve that eliminates stiction, resulting in smoother starts and more reliable performance.
Q: How are these injectors tested?
A: Every injector is fully disassembled, rebuilt, and then flow-balanced and leak-tested under multiple operating pressures to ensure consistent performance and durability.
Q: What is the warranty?
A: All Sinister Diesel injectors are covered by a 2-year unlimited mileage warranty.
Q: Why is there a 2–3 week lead time?
A: Each injector set is individually built, calibrated, and tested to order. The short lead time ensures precise quality control and the reliability Sinister Diesel is known for.
