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K&N 63-2581 4.9 out of 5 stars 18 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 Gain:12.05 HP @ 5304 RPM
Air Filter Color:Red
Air Filter Height:6 in (152 mm)
Air Filter Material:Cotton Gauze
Air Filter Outlet Shape:Round
California Restricted:Not legal for sale or use in California
Clamp Material:Steel
Clamp Style:Regular
Clamps Included:5
Couplers Included:2
Intake Pipe Color / Finish:Black
Intake Pipe Ports:All intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter Included:Mass Air Flow Sensor Adapter Included When Required
Part Number:63-2581
Product Box Height:12.5 in (318 mm)
Product Box Length:22.25 in (565 mm)
Product Box Width:14.25 in (362 mm)
Product Style:63 Series Aircharger Kits
Replacement Filter:RC-5173
Street Legal In All US States:No
TUV Approved (Europe):No
Vacuum Tubing Included:No
Weight:10.6 lb (4.8 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

Product Reviews

 Fits and works great. Just what I expected for my new F150.
Andy Bergstrom, Glenwood, Nebraska
 I had a regular KN air filter in my truck but did not notice a significant inprovement. I installed the cold air intake kit from K&N and what an inprovement. Sound wise, I was really inpressed with the motor noise, but most importantly, the improved milage vs just the regular air filter is impressive. I am getting almost three miles per gallon more now than before withthe cold air intake kit. Sound, performance and milage which has increased, makes me a very happy customer.
Rick Counts, Fort Myers, Florida
 Doesn't take long to install. The pictures on the instructions are not that great, but easy enough to figure out. Once complete, I immediately noticed a throatier sound on acceleration and improved gas mileage. Great product.
Pete Stachowicz, Hilo, Hawaii
 Product preformed as advertised and expected.
Shon Sergent, London, Kentucky
 Got this a week or two ago for my 5.0 '12 XLT. After starting up the truck for the first time, I got kind of worried that there wasn't going to be any noticeable changes to the truck. But as soon as it got into 3rd and started pulling some air, both the noise and power were very noticeable. Awesome up-grade for the price, making excuses just to take the truck out for any reason I can.
Mat, Cincinnati, Ohio
 The installation video very easy to use and I was done in minutes. My 2014 F-150 runs and sounds great!
Brian, Woodbridge, Virginia
 My experience with both installation and performance of my K&N filter was fantastic. The parts/directions were easy to use and I got the filter on in under an hour. It sounds excellent, and in the three weeks I've had it on I've already noticed an improvement in fuel consumption. I would definitely recommend this filter to anyone else with an F-150.
John, Oahu, Hawaii