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K&N 57-2539 Air Intake

57 Series FIPK / Performance Air Intake System
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57-2539
$326.99 USD
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Product Overview

  • 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)
  • Easy to install, usually in 90 minutes or less
  • Free-flowing high density polyethylene tube
  • Replaces entire factory air intake system
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 57-2539 Air Intake fits some Ford Explorer, and Mercury Mountaineer models. See vehicle applications link for details.
The K&N 57-2539 FIPK air intake system replaces the restrictive factory air filter and air intake. 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 57-2539 air intake comes with a chrome topped K&N high-flow air filter and a heat shield that installs into the previous 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, idle bypass hose and crank case vent 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, a ratchet set and several wrenches. 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]
Estimated Horsepower Gain8.64 HP @ 4486 RPM
Replacement FilterRF-1048
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
Clamps Included7
Clamp MaterialStainless Steel
Clamp StyleRegular
CARB EO NumberD-269-26
Couplers Included2
TypeGen II
Product Style57 Series FIPK
Air Filter Height6 in (152 mm)
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight11.2 lb (5.1 kg)
Air Filter Large End Diameter7.5 in (191 mm)
Product Box Height12.25 in (311 mm)
Product Box Length20.25 in (514 mm)
Product Box Width12.25 in (311 mm)
Mounting Hardware IncludedYes
Warranty1,000,000 Miles/10 Year
Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive harm--www.P65warnings.ca.gov

K&N 57-2539 Air Intake Product Reviews

Tuesday, November 13, 2018 - Part 57-2539
I installed a K&N 57-2539 FIPK Performance Air Intake System on my 4.6L V8 Ford Explorer in 2010; I highly recommend this product. There was a noticeable increase in horsepower and the engine sounds great Also, I get better gas mileage too, about 10-12 increase in mileage per tank. Recently, I contacted K&N customer service per some decay in the cloth filter element and the agent sent me a brand new filter ($60 value) no questions asked-no hassle just great customer service. I have always heard K&N stands by their products and now I know from personal experience. Thank you K&N

Joe Bauer
Vero Beach, Florida
Wednesday, September 14, 2016 - Part 57-2539
Relatively easy install, the directions could be a little clearer, but the intake is fantastic. My explorer is running half a notch cooler, and the sound is fantastic. I also noticed a slight difference when towing because of the small torque increase. It was worth every penny.

Dylan Pinette
Highlands Ranch, Colorado