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K&N 77-2581KP 4.8 out of 5 stars 5 Customer Reviews
Intake Kits > Performance Intake Kit

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77-2581KP
 
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Built for performance and show utilizing the highest quality components, the K&N 77 Series High-Flow Performance Air Intake is a free-flowing mandrel-bent aluminum tube induction system designed for Trucks and Sport Utility Vehicles. 77-Series air intakes come with K&N's Million Mile Limited Warranty. K&N intake systems replace 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 OEM air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The filters on these kits are washable and reusable. Most of our intake kits are relatively easy to install using tools commonly available (see installation instructions). This 77 Series Air Intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards. Check the K&N catalog or website vehicle parts search for specific CARB status.

[More Information on 77 Series Air Intakes]
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Free-flowing aluminum tube
  • Replaces entire factory air intake system
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty®
Available Information
Installation Instruction Sheet
77-2581KP Vehicle Applications
Dyno Chart - 2011 Ford F150 5.0L - 10.06HP Increase
Video Installation Video
News Story - 2011 and 2012 Ford F-150 5.0L Trucks Gain More 'Simple to Install' Power with K&N Air Intake System


Part 77-2581KP Product Specifications
Product Style: 77 Series Kits
Estimated Horsepower Gain: 9.95 HP @ 5508 RPM
Replacement Filter: RC-5173
Air Filter Color: Red
Air Filter Outlet Shape: Round
Street Legal In All US States: No
Air Filter Height: 6 in (152 mm)
TUV Approved (Europe): No
Air Filter Material: Cotton Gauze
Clamps Included: 5
Clamp Material: Stainless Steel
Clamp Style: Regular
Couplers Included: 1
Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
Intake Pipe Color / Finish: Polished
Intake Pipe Ports: All intake tube ports needed for the specified applications are included
Vacuum Tubing Included: No
California Restricted: Not legal for sale or use in California
Weight: 12.1 lb (5.5 kg)
Product Box Length: 35.5 in (902 mm)
Product Box Width: 13.25 in (337 mm)
Product Box Height: 10.5 in (267 mm)


Horsepower gains based on similar vehicle dynamometer test. Results will vary.


Product Reviews    See all reviews!  Review part 77-2581KP

 Easy to install after you get the tight rubber hoses on... All that means is that they wont come off!!! Great sound and performance is felt right away. Unfortunately no gas savings yet (my own fault) because I can't seem to stop hitting the peddle to the metal... Great kit and great overall piece.
Ty, Tucson, Arizona
 Great product, just getting it broke in. I can already feel the throttle response and low end torque. Interested to see how the MPG will increase, if by just a little as gas prices continue to rise.
Craig Lustek, Ohio
 I am very pleased and satisfied with the boost of horsepower and improved mileage!
Emre Goksu, Seneca Falls, New York