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57i Series Kits > Performance Intake Kit

List Price: $205.10
Your Price: $118.99

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K&N 57i Series Induction Kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take a variety of different forms based on vehicle characteristics and available space under the hood. Each kit is designed to provide power throughout the RPM range. The extra surface area of these open-air air filters provide even more airflow at lower restriction than a K&N O/E replacement filter which is always limited to the size of the factory air box. The larger air filter also captures and holds more dirt increasing its service life before a cleaning is required (up to 100,000 miles). The filter is either directly attached to the engine carburetor or throttle body or indirectly through a tube assembly running from the filter to the engine. All adapters are made from high quality materials such as steel, aluminum, silicon or reinforced nylon to ensure long life. 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 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 Height4.531 in (115 mm)
Air Filter Large End Diameter5.781 in (147 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeNot Flanged
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included1
Intake Pipe Color / FinishBlack
Intake Pipe PortsAll intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter IncludedMass Air Flow Sensor Adapter Included When Required
Product Box Height9 in (229 mm)
Product Box Length9 in (229 mm)
Product Box Width9 in (229 mm)
Product Style57i Series International Kits
Replacement FilterRC-9910
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen I
Vacuum Tubing IncludedNo
Weight3.1 lb (1.4 kg)

Customer Feedback

I added your filter and intake tube to my BMW 325i and am more than pleased. The growl is great and it removed a low down flat spot and added a little more kick but the best bit is it improved my fuel economy by at least 1.2L per 100km, a savings of about $1.60+ per 100km. It will pay for itself in the not too distant future. I have always had a K&N filters in my cars over the years and recommend them to everyone
Ross Colburn, Sunshine Coast, Australia
I put over 70000 miles on my 1995 BMW 325i before I got smart and put in the basic K&N replacement for the floppy OEM filter.  What a difference!

A few weeks ago, after rolling over 220,000 miles, my car was in the local BMW specialty shop for a full front to back inspection and tune up.  The owner of the shop test drove my car and remarked, when I picked it up, it had more power and torque than any non M type 3 series than he had ever experienced (this coming from a German certified BMW engineer).  

He sheepishly admitted to having given it a thorough test drive and asked what I had done to make it so powerful.  I replied that all it had was an aftermarket chip and a belatedly added on K&N air filter.

I have, over the years, flogged my 325i up and down mountain back roads and cruised over endless hours of interstate and have never wanted for more power. I still have the same dutifully cleaned and oiled K&N filter too!

Thank you K&N
Patrick Smith, Staunton, Virginia
Hi you guys, I bought another KN filter for my new BMW. I owned a Jetta with one of your wonderful filters. I used it several years and I never had to clean it. Now I bought a 328i BMW last month and the first thing I bought was one of your filters. The results are just beautiful. My brother who has the same car, is going to buy another KN filter next week, we can't believe the magic results.

Thanks again,
Alejandro Barreda Westphal, Mexico City, Mexico