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K&N 63-2581 4.9 out of 5 stars 26 Customer Reviews
63 Series Aircharger Kits > Performance Intake Kit

List Price: $484.92
Your Price: $266.99

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The K&N AirCharger 63-2581 air intake system replaces your vehicle’s restrictive factory air filter and air intake housing. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your vehicle’s engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine’s RPM range. The 63-2581 air intake comes with a chrome topped K&N high-flow air filter inside a heat shield that mounts to the lower air box. The position of the air filter inside the heat shield helps direct cooler, denser air into the custom molded intake for a guaranteed power gain. The oversized air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This air intake is relatively easy to install requiring only a screwdriver and several wrenches. This air intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.

[More Information on K&N AirCharger Air Intakes]
  • Guaranteed horsepower gain
  • Designed to improve throttle response and engine sound
  • Free-flowing high density polyethylene tube
  • Replaces entire factory air intake system
  • Not legal for highway use in states adopting California emission regulations
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
  • K&N Million Mile Limited Warranty

Product Specifications

Estimated Horsepower Gain12.05 HP @ 5304 RPM
Air Filter ColorRed
Air Filter Height6 in (152 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialSteel
Clamp StyleRegular
Clamps Included5
Couplers Included2
Intake Pipe Color / FinishBlack
Intake Pipe PortsAll intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter IncludedMass Air Flow Sensor Adapter Included When Required
Product Box Height12.5 in (318 mm)
Product Box Length22.25 in (565 mm)
Product Box Width14.25 in (362 mm)
Product Style63 Series Aircharger Kits
Replacement FilterRC-5173
Street Legal In All US States No
TUV Approved (Europe)No
Vacuum Tubing IncludedNo
Weight10.6 lb (4.8 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

Product Reviews

  This item was priced competitivel. What I received was what I ordered, and it arrived as advertised. I am happy with the product and with the online shopping experience.
Robert Forsythe Florence Oregon
  Very easy to install. Noticed a difference right away. A slightly better pickup on launch and the engine gives off a better throaty noise then before. Overall, I am very satisfied with this purchase and would highly recommend it to anyone looking for a performance boost at a great cost!
Cory Virginia
  I am extremely pleased with how fast the shipping was, excellent packaging and good installations instructions. I am more pleased with results after installing the cold air intake on my F-150. Installation is a bit tedious but very doable. The system looks great under the hood, looks better than factory for sure. There is a very noticeable improvement in sound and performance. I haven't had it long enough to measure an improvement in mileage but would suspect so. I am very satisfied with the K&N product line and results are at least as good if not better than advertised.
Sam Oklahoma
  The K&N 63-2581 Performance Intake Kit for My 2014 Ford F-150 was a perfect fit, the instructions where clear and precise and fitment was great!
Dana Silva Fort Scott, Kansas
  Fast delivery, best price. System fits like a glove. Installation was a snap, less than an hour. Nice performance increase as well as better mileage. It's been way too cold for a real MPG comparison. I'm looking forward to an increase when the temps moderate.
Larry Wisconsin
  Over all 1.5 mpg increase and smoother take off, but it is very loud!
Allan Teshera Ferndale Washington
  It took 30 minutes to install. Ended with 1.5 - 3.0 more MPG. (city-hwy)
George Orlando, Florida