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K&N 57-2581 Air Intake

57 Series FIPK > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.8 out of 5 stars   15 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

Friday, March 31, 2017 - Part 57-2581
The lag in acceleration is gone, engine sounds mean. I haven't noticed anything in mileage yet, though.

Jared Sebesta
Duluth, Minnesota
Thursday, March 30, 2017 - Part 57-2581
Great product, instant performance and easy install.

Robert Williams
Fort Worth, Texas
Monday, February 6, 2017 - Part 57-2581
Easy install. Fit and finish, great quality. Nice sound and performance.

Ron Rewald
Waterford, Canada
Tuesday, January 31, 2017 - Part 57-2581
Truck sounds awesome but I just haven't seen the increased horsepower and mileage.

Robin Davis
Noblesville, Indiana
Thursday, January 26, 2017 - Part 57-2581
Best bet for your truck. More than worth the money. I would buy it again.

James Barnett
Easley, South Carolina
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