K&N 57I-2503

57i Series Kits > Performance Intake Kit
List Price: $396.30
Your Price: USD $217.99

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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
  • 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

Product Specifications

Air Filter ColorRed
Air Filter Height6.344 in (161 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included1
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Product Box Height12 in (305 mm)
Product Box Length22 in (559 mm)
Product Box Width14 in (356 mm)
Product Style57i Series International Kits
Replacement FilterRC-70031
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen II
Weight5.2 lb (2.3 kg)

Customer Feedback

Be the first to review part 57I-2503
Good product...worked well on my ford...just put this product on my Chevrolet and can't tell a difference...actually believe I lost power.

Jared Tyndal
Kenansville, NC
Wow I can't believe how good this air filter is. I drive a 2014 Ford Focus Hatch automatic with dual clutch transmission. I bought this air filter based on the recommendation of a friend. I really can't believe what a difference this air filter has made in my vehicle. This air filter has great improved my low end torque and acceleration. It has not made into a sports car but there definitely is a noticeable improvement. Periodically I would get that transmission stutter from the dual clutch transmission, not often but once in a while. With this new air filter I have not experienced that once. This air filter has worked so well I am thinking of investing in the air intake system for $299. There is no reason you shouldn't have on of these filters in your car. A life time part for $60. Instead of paying $20 every 10,000 miles. This really is a no brainer.

Boston, Massachusetts
The K&N cold air intake kit is great on my 2005 Ford Explorer. I ordered the kit about 2 years ago. I pull a heavy trailer. The explorer is barely big enough to pull it. Installing this kit is a BIG help in letting the engine breathe. It sounds great and makes me feel better too, putting this load on my car. The installation was straight forward and the instructions were excellent. The installation was no problem. Only 2 minor issues. The airflow sensor mounting pad had a casting lap that deformed the mounting surface. I was able to smooth it out with a sharp knife and light sanding. The other issue was that I mounted the filter such that it was riding hard on the bottom of the intake box. This was my fault. I didn't find out until I took the filter off to clean and re-oil it and found a very small worn spot on the filter. When I install this new filter I will make sure that the filter is free from interference all around. Thanks for a great product I'll be using K&N from here on out.

Phil Kirby