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K&N 57-2581 Air Intake

57 Series FIPK > Performance Intake Kit
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   10 Customer Reviews
  • Guaranteed to Increase Horsepower
  • Designed to improve throttle response and engine sound
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Replaces entire factory air intake system
  • Free-flowing high density polyethylene tube
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 57-2581 Air Intake fits some Ford F150 models. See vehicle applications link for details.
The K&N 57-2581 FIPK air intake system replaces the restrictive factory air filter and air intake housing in specific Ford F150 V8 models. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your 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. This air intake comes with a chrome topped K&N high-flow air filter and a heat shield that installs into the lower air box space. Air is directed through an aerodynamically engineered intake tube into the engine’s throttle body for a guaranteed power gain. The tube accommodates the factory mass air sensor, crank case vent hose and EVAP hose. 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, ratchet set and several wrenches.

[More Information on FIPK Air Intake Systems]

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
CARB EO NumberD-269-48
Clamp MaterialSteel
Clamp StyleRegular
Clamps Included5
Couplers Included2
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Product Box Height12.5 in (318 mm)
Product Box Length22.25 in (565 mm)
Product Box Width14.25 in (362 mm)
Product Style57 Series FIPK
Replacement FilterRC-5173
Street Legal In All US StatesYes
TUV Approved (Europe)No
TypeGen II
Weight10.6 lb (4.8 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 57-2581 Air Intake Product Reviews

Thursday, December 29, 2016 - Part 57-2581
Easy installation. Most notable change is the sound of the truck under acceleration. Primary reason for purchase was mileage, not horsepower. Will make the MPG improvement after 4-5 tanks compared to 4-5 tanks prior to installation.

Robert Lindsey
Utica, Pennsylvania
Tuesday, December 27, 2016 - Part 57-2581
I am very pleased with the K&N CAI that I purchased for my 2013 F-150. The sound is awesome compared to the stock intake. I've noticed a slight MPG gain, it went from 17mpg to 18.5mpg in heavy traffic. We haven't been on a long road trip with it yet, so not real sure on the highway gain. The power gain is barely noticeable but it does seem just a tad more responsive on the throttle. As soon as the exhaust is upgraded I'm sure the power gain will be more noticeable. I'm not doing it for the power though, the mileage is what I'm after and it has passed that test so far with flying colors. I haven't had any problems thus far with the MAS as noted in some other reviews. More to come as we put some miles on it.

Bradley Combs
Wesley Chapel, Florida
Sunday, November 13, 2016 - Part 57-2581
Very happy with the increase in mileage and performance.

Chris Martin
Walnut, California
Wednesday, August 24, 2016 - Part 57-2581
I just installed my new K&N Intake on my 5.0L F-150. I LOVE it! At first, I was surprised on how loud it was when I stepped into the throttle But, it definitely gave the truck a little "umph". It needed that and I really love it.

Lowell Anderson
Fort Worth, Texas
Friday, July 8, 2016 - Part 57-2581
I thoroughly enjoy my cold air intake on my F150 5.0. Definite and obvious volume increase as well as power. I have only had it for a couple of weeks now but my gas mileage has improved by a couple miles per gallon. (As long as I stay off of the gas just to hear it purr) I thought this would curb my appetite for upgrades but it has made me want more because I enjoy knowing that with quality products like K&N, I can improve my vehicle and customize it to my liking. I have never had K&N products until now but I am sold and am now a huge fan. Installation was simple and quick. Customer service was fantastic. I overtightened a piece on the intake and broke it. They sent a replacement part immediately and never charged another cent. Super polite and even offered suggestions on removal and how to tighten the piece correctly. I highly recommend this product to anyone. Thanks for great equipment and simple instructions.

West Virginia
Sunday, June 19, 2016 - Part 57-2581
This kit is seriously easy to install. The power difference was noticeable immediately. The growl from under the hood that comes from installing this kit keeps that skinny peddle down a little longer and harder than it used to. K&N you have done it once again. I have a FIPK on all my vehicles. They are worth it!

Joe Fox
Richlands, North Carolina
Friday, June 17, 2016 - Part 57-2581
Sounds awesome, performs great and easy to install.

Donald Klover
Portage, Indiana