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57I-2501
$198.99 USD
MSRP $361.39 44.9% Off
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K&N 57I-2501

57i Series Kits > Performance Intake Kit
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Replaces entire factory air intake system
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
  • 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 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]

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

Very Good Intake. Installed on my 2009 Ford Focus 2.0L SES. As soon as I started driving it, there was a great difference in power and sound. After about a week of driving, I noticed my gas mileage rose. The only problem we had was installing it, which took about 3 hours, but it was all worth it.

Chris
Wisconsin
I have K&N filters in all of my cars and I love them. They hold up for years and they are easy to clean. This last one I bought for my Ford Focus was a bit difficult to install as it fit really tight. I like my K&N hat too.

Larry Hoffman
Kettering, Ohio
After reading other reviews I decided this was the intake for my 2013 Ford Focus with the 2.0L Duratec engine. Great sound and noticable performance, plus better fuel economy. The numbers don't lie. The provided dyno info was almost exact when I had put mine on the dyno. Nearly 10hp gain through the meat of the power curve.

Jason
Idaho