Choosing the best 6.7L Power Stroke fuel injector upgrade is less about buying the biggest set you can find and more about matching injector size to a realistic power goal and confirming the right fitment for the 2011 to 2019 trucks. The 6.7L Power Stroke, Ford's in-house Scorpion diesel, uses a high-pressure CP4.2 pump and a large factory injector, so the useful upgrade steps are smaller percentages than on older diesels. Get that sizing right and a fresh set cures the rough running of tired injectors and feeds a tuned truck cleanly. The wrong set brings smoke, heat, and wasted money. This guide covers how to size 6.7 Power Stroke injectors, the fitment you must get right, and our top Exergy picks so you buy once and buy correctly.
How 6.7L Power Stroke injector sizing works
Upgraded injectors are described by how much more fuel they flow than stock, such as 30 percent over, 100 percent over, or 300 percent over. That number is added fuel capacity, not free power. Because the 6.7 Power Stroke injector starts large, these smaller percentages still add meaningful fuel, and a larger injector only makes more power when the pump, the turbo, and the tune can actually use it. Pick a size that matches your build, because the best 6.7L Power Stroke fuel injector for you is the one balanced to your goal, not the biggest on the shelf.
- Stock restore and light tune (daily, tow): a 30 to 60 percent over set restores a tired 6.7 and supports a mild tune while staying clean and cool.
- Moderate power (tuned street and tow): a 100 to 200 percent over set, paired with a supporting pump and tune, adds real usable power.
- High power (dedicated builds): a 300 percent over set belongs on builds with the air, fuel supply, and drivetrain to match.
Get the 6.7 Power Stroke fitment right
These injectors fit the 2011 to 2019 Ford 6.7L Power Stroke, the Scorpion engine built around the CP4.2 fuel system. They are specific to this engine and are not interchangeable with the 6.0L or 6.4L Power Stroke that came before it, which used entirely different injection systems. Match your exact engine and year before anything else:
- 6.0L Power Stroke (2003-2007): its own hydraulic injectors, not a 6.7 part.
- 6.4L Power Stroke (2008-2010): its own common-rail injectors, different again.
- 6.7L Power Stroke (2011-2019): the Scorpion set you want here, on the CP4.2 fuel system.
Confirm you have a 6.7 Power Stroke, then choose the size. Getting the fitment right matters more than chasing a specific flow number.
Our top 6.7L Power Stroke injector picks
These Exergy Scorpion sets cover the common 6.7 needs from a clean restore to a serious build, and each is sized in clear steps so you can match your goal.
Best for a stock restore or light tune
For a high-mileage 6.7 that idles rough or smokes, the Exergy 30 percent over reman Scorpion set restores healthy flow, and the 45 percent over set or 60 percent over set add a little headroom for a daily-and-tow truck.
Best for a tuned street and tow build
For a tuned truck with a supporting pump, the Exergy 100 percent over set and the 200 percent over set add real usable power for a street-and-tow 6.7 with a matching tune.
Best for a high-power build
For a dedicated build with the air and fuel to match, the Exergy 300 percent over set for the 6.7 Power Stroke delivers the fuel a big turbo and aggressive tune can use. Step down for a milder truck.
You can compare every size and option in our diesel injector and seal parts section.
Match the injectors to the rest of the build
Injectors are one leg of the fueling stool. To use bigger injectors you also need a healthy high-pressure pump and low-side that can keep the rail full, a turbo that can move enough air to burn the added fuel cleanly, and a tune written for the injector size. On the 6.7 Power Stroke this is also where many owners weigh the CP4.2 pump against a conversion for long-term reliability and fueling headroom. If you are deciding how far to step up, our guide on stock versus upgraded diesel injectors lays out when to move up and by how much, and our 6.0 vs 6.4 vs 6.7 Power Stroke comparison puts the engines in context.
Signs your 6.7 Power Stroke injectors are worn
6.7 Power Stroke injectors rarely fail all at once. They give warning signs first, and catching them early protects the rest of the fuel system. Watch for a rough or shaky idle, especially when cold, a knock or rattle from one cylinder, white or hazy smoke that does not clear, hard starting, and a drop in fuel economy. Fuel showing up in the oil, seen as a rising oil level or a fuel smell, is a serious sign of a leaking injector and should be addressed right away. Injector balance data that reads far off on a scan tool confirms which cylinders are worn. If you see several of these together on a high-mileage 6.7, a fresh matched set is usually the cure, and it is the moment many owners decide whether to restore stock flow or step up in size.
Frequently Asked Questions
What is the best 6.7 Power Stroke injector size for a daily driver?
For a daily or tow truck, a 30 to 60 percent over set is usually the best 6.7L Power Stroke fuel injector choice. It restores healthy flow, smooths the idle, and clears smoke while supporting a mild tune and keeping the truck reliable and cool.
Why are 6.7 Power Stroke percentages smaller than on older diesels?
The factory 6.7 injector is already a large piece, so a smaller percentage over stock still adds meaningful fuel. A 100 percent over 6.7 set is a serious step, where an older engine might need a larger number for similar results.
Do the 6.0, 6.4, and 6.7 Power Stroke use the same injectors?
No. The 6.0L, 6.4L, and 6.7L Power Stroke each use their own injectors on entirely different injection systems, and they are not interchangeable. Confirm you have a 2011 to 2019 6.7 before choosing a set.
What else do I need when upgrading 6.7 Power Stroke injectors?
A healthy high-pressure pump and low-side supply, a turbo sized to move the air, and a tune written for the injectors. Balance the whole system so the added fuel makes clean, reliable power.
Bottom line
The best 6.7L Power Stroke fuel injector upgrade is the one that fits your 2011 to 2019 truck and is sized to a real power goal with matching fuel and tune. Confirm 6.7 Scorpion fitment first, then pick your flow step: 30 to 60 percent over to restore a tired stock engine, 100 to 200 percent over for a tuned street-and-tow build, or 300 percent over for a dedicated high-power truck. Match the injectors to the pump, turbo, and tune, and your 6.7 Power Stroke runs smooth while it makes the power you actually want.
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