63-2581 Image

K&N 63-2581 4.7 out of 5 stars 38 Customer Reviews
63 Series Aircharger Kits > Performance Intake Kit

List Price: $484.92
Your Price: USD $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
Video Installation Video

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 isnt great at all..I have had it since December and I think I get worse miles on my truck with it installed. Only thing good about it is that my truck sounds like it has power but all in all it doesn't. Kind of wasted my money on this.
Tony Housholder Willoughbh, Ohio
  Order, delivery, and install went very well
Gerald Bevel Alabama
  It is the best thing I have ever done to my Ford F150. It runs better, sounds great and better gas mileage.
Norman Watts Florida
  Very easy to install, great product, so far very impressed.
Sdoc Georgia
  Fast delivery, Everything was as described. Easy to install. Does feel like there was a power increase. It was louder than I was expecting. I would have gone for the unit with less horsepower if I would have known it was this loud. I guess to get the extra horse power you will lose something.
David Boswell Dallas,Texas
  Looks great, easy to install. Sounds great most of the time. Some engine sounds at certain rpms sound awful and echo very loudly throuought the truck. Makes you either take your foot off the gas or speed up to avoid obnoxious sound.
Dan Bass Long Island
  Fit and finish of the parts in the kit was great and the installation instructions were easy to follow. The fit (alignment) of the crankcase vent to the new K&N intake pipe was not great but seemed to work. The fit of the air flow sensor harness was not great, too tight, with no slack to be gained to improve the fit to the new location on the K&N intake pipe. Other then that the kit was clean. I noticed a performance increase improved response, improved power, and better sound. The jury is still out on gas mileage improvement, time will tell.
James Niehoff Rosemount, Minnesota