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57i Series Kits > Performance Intake Kit

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57I-2501
 
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K&N 57i Generation II Induction Kits are built primarily for European vehicles. They come with K&N's Million Mile Limited Warranty™. These intake kits use only non-metallic rotationally molded tubes that can reduce air temperature and decrease intake sound over a metal tube. Restriction can exist BETWEEN an air filter and the engine reducing the benefit of a K&N Air Filter alone. The weakest link in the airflow "chain" robs a vehicle of its natural horsepower. Often that weak point is the factory air path leading to the engine. K&N Air Intake Kits virtually eliminate air path restriction by replacing the air filter and the entire air path to the engine. The aerodynamically engineered tube drives a massive amount of air into an engine, which translates into POWER. 57i Intakes are not legal for use in California and other US States adopting California emission standards.

[More Information on 57i Air Induction Kits]
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Replaces entire factory air intake system
  • Not legal for highway use in US states adopting California emission regulations
  • Washable and reusable lifetime air filter
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
  • K&N Million Mile Limited Warranty®
Available Information
Installation Instruction Sheet
57I-2501 Vehicle Applications
Instructions Francaises - French


Part 57I-2501 Product Specifications
Product Style: 57i Series International Kits
Replacement Filter: RF-1005
Air Filter Color: Red
Air Filter Outlet Shape: Round
Street Legal In All US States: No
Air Filter Height: 4.5 in (114 mm)
TUV Approved (Europe): No
Air Filter Material: Cotton Gauze
Clamps Included: 6
Clamp Material: Stainless Steel
Clamp Style: Regular
Couplers Included: 1
Type: Gen II
Intake Pipe Color / Finish: Black
Intake Pipe Ports: All intake tube ports needed for the specified applications are included
Vacuum Tubing Included: No
Air Filter Large End Diameter: 5.875 in (149 mm)
California Restricted: Not legal for sale or use in California
Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
Weight: 6 lb (2.7 kg)
Product Box Length: 20 in (508 mm)
Product Box Width: 10 in (254 mm)
Product Box Height: 10 in (254 mm)



Customer Feedback      Be the first to review part 57I-2501

I love this air filter, the way it makes my 2014 Ford Focus ST sound and perform is amazing. Can't thank my amazing girlfriend enough for getting me this, this past Father's Day. Awesome product.
Paul Waters, Houston, Texas
This isnt so much about the improvement of filtration as is it about the durability.I was changing the oil in my 2010 Ford Focus and I took my K&N Air Filter out to wash it.As I normally do I have a back up stock filter to put in my car while my K&N dries overnight.Not thinking as I backed out of the garage I drove over top my K&N flat panel filter drying in the sun.I reluctantly got out looked under the car and there it was tire track straight across the filter and not even a dent in the screen on it I was amazed.I had to write an tell you about how what could have been a catastrophe turned out to make an even bigger believer in K&N filters out of me I have one in my truck, My race car, my Focus and my fourwheeler.Id never be without one Thanks Again.
Charles Walker, Shepherdsville ,Kentucky
Installed on a 2014 Ford Focus ST. I couldn't be happier! Very easy to install and super fast shipping. Noticeable throttle response improvement. Much better sound than stock filter (which can only lead one to believe it has much better air flow). Nearly 4mpg gained (VS stock filter, data gathered over 2 weeks, driving the same route at roughly the same speed 7 days a week). All and all I couldn't be happier. I've been so impressed with it that I talked my dad into getting one for his 2010 Titan. You get a nice little K&N decal in the box with this one. I stuck it on my airbox :D.
Matthew Griggs, South Carolina