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K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details.

  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states

This drop in filter fits the following vehicles : 

F-250 Super Duty KingRanch 2WD (6)
F-250 Super Duty KingRanch 4WD (6)
F-250 Super Duty Lariat 2WD (6)
F-250 Super Duty Lariat 4WD (6)
F-250 Super Duty Limited 4WD (2)
F-250 Super Duty Platinum 4WD (6)
F-250 Super Duty XL 2WD (6)
F-250 Super Duty XL 4WD (6)
F-250 Super Duty XLT 2WD (6)
F-250 Super Duty XLT 4WD (6)
F-350 Super Duty KingRanch 2WD (6)
F-350 Super Duty KingRanch 4WD (6)
F-350 Super Duty Lariat 2WD (6)
F-350 Super Duty Lariat 4WD (6)
F-350 Super Duty Limited 4WD (2)
F-350 Super Duty Platinum 2WD (6)
F-350 Super Duty Platinum 4WD (6)
F-350 Super Duty XL 2WD (6)
F-350 Super Duty XL 4WD (6)
F-350 Super Duty XLT 2WD (6)
F-350 Super Duty XLT 4WD (6)
F-450 Super Duty 2WD (2)
F-450 Super Duty 4WD (2)
F-550 Super Duty 2WD (2)
F-550 Super Duty 4WD (2)