For 2008-2010 F450 Super Duty 6.4L V8. For 2008-2010 F350 Super Duty 6.4L V8. For 2008-2010 F250 Super Duty 6.4L V8. For 2008-2010 F550 Super Duty 6.4L V8. Connect the secondary air intake hose to the Air filter box outlet housing and position the cover on the Air filter box housing.
