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K&N 57-2503 Air Intake

57 Series FIPK > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7 out of 5 stars   6 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
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 57-2503 Air Intake fits some Ford Bronco, Ford F Super Duty, Ford F150, Ford F250, and Ford F350 models. See vehicle applications link for details.
The K&N 57-2503 FIPK air intake system replaces 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 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. The 57-2503 air intake comes with a vent hose and chrome topped K&N high-flow air filter that mounts in the previous air box space. Air is directed through dual intake tubes that lead into the engine’s throttle body for a guaranteed power gain. The oversized, oval tapered cone-shaped air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This air intake usually installs in about 90 minutes and requires commonly available tools. K&N 57 Series FIPK's are street legal in all 50 US states and come with K&N's Million Mile Limited Warranty.

[More Information on K&N FIPK Air Intake Systems]

Product Specifications

Estimated Horsepower Gain5.32 HP @ 3654 RPM
Air Filter ColorRed
Air Filter Height9 in (229 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeNot Flanged
CARB EO NumberD-269-17
Clamp MaterialStainless Steel
Clamp StyleMini
Clamps Included5
Product Box Height9.25 in (235 mm)
Product Box Length15.13 in (384 mm)
Product Box Width9.13 in (232 mm)
Product Style57 Series FIPK
Replacement FilterRF-1012
Street Legal In All US StatesYes
TUV Approved (Europe)No
TypeGen I
Weight6 lb (2.7 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 57-2503 Air Intake Product Reviews

Sunday, April 12, 2015 - Part 57-2503
Very easy to install, gained about 5 hp and immediately felt better acceleration in my 91 Ford F-150.

Friday, January 23, 2015 - Part 57-2503
I was impressed with the difference replacing the stock air filter with the K&N made with my F250 7.5. Now that I have replaced the stock housing with this intake kit I am very excited. The placement of the new housing was super easy. Don't let drilling 3 holes scare you as it is easy. If I can do it anyone can. Just follow the excellent documentation. Can't wait to get the new exhaust to complete the breathing on the system.

Mark Austin
Pine, Arizona
Monday, July 28, 2014 - Part 57-2503
No issue with installation. I feel that I did get a little more HP out of my engine with this modification. Next, will be installing an RV cam to get more HP out of this engine.

Bill M.
San Jose, California
Thursday, April 24, 2014 - Part 57-2503
Easy to install. Instant improvement in response to acceleration. Improvement in gas mileage.

Paul W. Cackowski
Johnstown, Colorado
Tuesday, November 26, 2013 - Part 57-2503
Great product! Not only can I feel the difference, I can hear the difference as well! Easy and quick to install. I run K&N on all my trucks!

Bill Alexander
Kapaa, Hawaii
Monday, November 4, 2013 - Part 57-2503
The best investment I have made to two of my trucks. Added three miles to the gallon on my 351w bronco and almost two to my 460 f-250. Easy to install and adds some extra power by removing air restriction. Once again very good product.