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K&N 77-2591KP Air Intake

Intake Kits > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   14 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 77-2591KP Air Intake fits some Ford F150 models. See vehicle applications link for details.
The K&N 77-2591KP 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 77-2591KP air intake comes with a chrome-topped K&N high-flow air filter and a heat shield that installs onto the lower air box. Air is directed through the intake tube into the engine’s throttle body for a guaranteed power gain. 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 and an Allen wrench. 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 Gain13.86 HP @ 4553 RPM
Replacement FilterRC-5173
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
Clamps Included5
Clamp MaterialStainless Steel
Clamp StyleRegular
Couplers Included2
Product Style77 Series Kits
Air Filter Height6 in (152 mm)
Intake Pipe Color / FinishBright Aluminized Metal
Intake Pipe MaterialAluminum
CARB EO NumberD-269-46
Street Legal In All US StatesSee Application Link Above
TUV Approved (Europe)No
Weight11.2 lb (5.1 kg)
Product Box Height10.5 in (267 mm)
Product Box Length35.5 in (902 mm)
Product Box Width13.25 in (337 mm)
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 77-2591KP Air Intake Product Reviews

Monday, March 12, 2018 - Part 77-2591KP
Really easy to install, took about 30 minutes instead of the 90 that was listed. Upon my road test I didn't notice a difference between 1,000-2,500 RPMs but once i got close to 3,000....WOW What a noise I could also notice a little more pick up. I'm also getting about 0.8 MPG better on the average. So far I'm very happy with this product. 2015 F-150 with 5.0

Jesse C
Jessup, Maryland
Monday, November 13, 2017 - Part 77-2591KP
Fast delivery and great customer service.

Natalie Hopkins
Eemonton, Canada
Monday, October 2, 2017 - Part 77-2591KP
This is very loud so be warned when driving up grade or pulling, you can't even talk in cab its so loud. In 1100 mile saw no improvement in mileage or performance. was a little more peppy but thats it.

Clifford Hannam
Arvada, Colorado
Tuesday, August 29, 2017 - Part 77-2591KP
Very easy to install. Low maintenance. Minimal increase in power.

Ron Thomas
Hollister, California
Monday, July 17, 2017 - Part 77-2591KP
Love the sound and performance gain. Only took one hour to install and I took my time. Looks great, love to open thee hood and show it off.

Brian Haley
Greenfield, Indiana
Wednesday, June 14, 2017 - Part 77-2591KP
Easy installation and big difference on gas mileage and power. Two thumbs up.

Tanner Dickson
Dobie, Canada
Tuesday, April 4, 2017 - Part 77-2591KP
Product was delivered on time and took less than an hour to install. Definitely notice an increase in acceleration and power. The sound is great too especially with the catback 3 inch Magnaflow exhaust. I'm extremely satisfied with this purchase.

Linwood R Nelson
Laurel, Maryland