The 6.4L Powerstrokes of 2008 to 2010 are plenty powerful but with a few fuel system optimizations and upgrades you'll be able to truly maximize your Super Duty's potential. One of the better things you can do to even a bone-stock Super Duty is grab an air/fuel separator that eliminates air bubbles from your inbound fuel caused by in-tank sloshing. This unbroken stream of fuel allows your injectors to spray more efficiently to give you more power, better fuel mileage, and reduced emissions. If you're going for an intense, high-powered Super Duty build, then take a look at our performance fuel injectors that supply larger volumes of fuel to your cylinders to support huge modifications and extremely aggressive tuning. After you're through here, take a look at our 6.4L Powerstroke differential covers, or our Super Duty leveling & lift kits.