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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 K&N 57i Induction Systems]
  • 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®

Product Specifications

Air Filter ColorRed
Air Filter Height4.5 in (114 mm)
Air Filter Large End Diameter5.875 in (149 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included6
Couplers Included1
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene & Flex Hose
Product Box Height10 in (254 mm)
Product Box Length20 in (508 mm)
Product Box Width10 in (254 mm)
Product Style57i Series International Kits
Replacement FilterRF-1005
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen II
Weight6 lb (2.7 kg)


Customer Feedback


Replaced the stock air filter on my 2001 Ford F150 with a K&N replacement filter. I noticed an immediate increase in responsiveness and from the first full tank an increase in my gas mileage. Since this is vehicle is used more around town the gas mileage is low but I increased by at about 2 MPG. Considering a standard air filter cost about $40 per replacement this will be a financial savings after two replacements. I typically replace the filter ever 8k miles since I do some dirt road travel, this will be an easy wash and reinstall. Highly recommend these filters, should have done this sooner. I have replaced the standard air filter on my 2014 Dodge Charger with the same results and will replace the filter on my daughters 2013 Ford Focus shortly.
GARY, Windham, New Hampshire
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