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K&N 77-2581KP Air Intake

Intake Kits > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7 out of 5 stars   25 Customer Reviews
  • 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
The K&N 77-2581KP Air Intake fits some Ford F150 models. See vehicle applications link for details.
The K&N 77-2581KP high-flow performance air intake system is a free-flowing, mandrel-bent aluminum tube air induction system designed to fit some Ford F150 models. The restrictive factory air filter and air intake housing on your vehicle are replaced by this K&N air intake system which is designed to dramatically reduce air flow restriction as it smoothes and straightens air flow. The improved air flow allows your engine to inhale a larger amount of air than it would from the stock air intake. More air means more usable power and acceleration throughout your engine’s RPM range. The 77-2581KP air intake comes with a chrome topped K&N high-flow air filter and a heat shield that installs onto the lower airbox. Air is directed through the intake tube into the engine’s throttle body for a guaranteed power gain. The intake tube has an attractive chrome-like finish that's made to last and it accommodates the factory mass air sensor and replacement crank case vent and EVAP check valve hoses. The oversized cone shaped 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 usually in 90 minutes or less using existing factory mounting points. The tools needed are a screwdriver, T-20 Torx driver and several wrenches. Some K&N 77 series air intakes are not legal for sale or use in California and other states adopting California emission standards while others are CARB exempt and 50 state legal. Check the K&N catalog or website for vehicle applications and specific CARB status for each vehicle and air intake.

[More Information on K&N 77 Series Air Intake Systems]

Product Specifications

Estimated Horsepower Gain9.95 HP @ 5508 RPM
Air Filter ColorRed
Air Filter Height6 in (152 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
CARB EO NumberD-269-48
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included5
Couplers Included1
Intake Pipe Color / FinishPolished
Intake Pipe MaterialAluminum
Product Box Height10.5 in (267 mm)
Product Box Length35.5 in (902 mm)
Product Box Width13.25 in (337 mm)
Product Style77 Series Kits
Replacement FilterRC-5173
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight12.1 lb (5.5 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 77-2581KP Air Intake Product Reviews

Monday, January 9, 2017 - Part 77-2581KP
It made all the diffrence in the world regarding performance. Highly recommend this for anyone.

Lawrence Dean
Orlando, Florida
Sunday, December 25, 2016 - Part 77-2581KP
Absolutely love this air intake system for my 2013 F-150. Pretty simple to install. Instructions were easy to follow and it took me a good 45 minutes to install which I was very pleased with. Not too long at all. Engine sounds great upon giving it a good amount of gas. I was actually shocked at how good it sounded the first time I hit the gas pedal a decent amount. The system definitely delivers a much deeper and more powerful sound to the engine. The horsepower increase is noticeable. For sure recommend to anyone thinking about making this upgrade to their truck

Green Bay, Wisconsin
Friday, October 28, 2016 - Part 77-2581KP
Installation was quite easy and straight forward. Not sure if my gas mileage has improved because it sounds so good, I can't keep my foot out of it!

Charles Hill
Mason, Ohio
Monday, October 17, 2016 - Part 77-2581KP
The kit fit just right, looks great, told all of my buddies about it. This is the 3rd kit I got from you all. Thanks again, Herb Eckert

Herbert Eckert III
Amelia Court House, Virginia
Tuesday, October 11, 2016 - Part 77-2581KP
Definitely worth the investment. Purchased this for my 2011 5.0 F150, sounds great when you hit the throttle. You can definitely feel the engine can breathe better. Did not really notice an increase in mpg, but I have a different driving habit than most people.

Wonder Lake, Illinois
Monday, September 19, 2016 - Part 77-2581KP
Very,Very loud. Even when simply cruising around town this CAI is loud. If you hit the gas you're definitely going to make your presence known.

William Goss
Mohegan Lake, New York
Friday, September 9, 2016 - Part 77-2581KP
Sounds great! Got about 1-2 miles more per gal. Want to get intake for other vehicles, just wish they were a little less expensive.

Matthew Jensen
Plymouth, Minnesota