63-2581 Image

K&N 63-2581 4.8 out of 5 stars 33 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

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

  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
  This system really woke up my 5.0 Coyote engine.You can definitely feel the difference, and the awesome growl sounds great coming from under my hood. Had it installed in only an hour and it was very easy. Forget the rest.This is the best
James H. Randolph Dresden, Tennessee
  Some what easy install. Instructions were not specific enough and gained power on acceleration. But no better gas mileage.
Kendall Ohio
  What a gain in hp and fuel mileage.Truly baddass.
Tommy Chesterfield, Virginia
  Went on easy, took about 30-45 minutes. Started the truck and stepped on the gas and sounds like a BEAST while accelerating. Haven't tested the mpg yet but just by the feel of it well worth the money.
Ryan Houston, Texas
  Super fast delivery.. Clear and precise instructions. Awesome product. Installed on a 2012 f-150 crew cab 5.0 v8. Does just as listed. Mileage increase, HP increase and awesome sound under load though perfectly quiet at cruise speeds. I want one for every vehicle I own !
Johnny Brookhaven, Mississippi