Fuel Pressure Regulator Blue Spring Upgrade Kit is a direct fit for the following:

2003-2007 Ford F-250 Super Duty
2003-2007 Ford F-350 Super Duty
2003-2007 Ford F-450 Super Duty
2003-2007 Ford F-550 Super Duty

-With 6.0L Diesel Engines
Helps Maintain Fuel Pressure While Idle, Driving & When Throttle Is Wide Open!
-This Is The "Blue Spring" Fuel Pressure Upgrade Kit