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57-0070
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K&N 57-0070 Air Intake

57i Series Kits > Performance Intake Kit
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   3 Customer Reviews
  • 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®
The K&N 57-0070 Air Intake fits some BMW 320i, BMW 323i, BMW 325i, and BMW 325iX models. See vehicle applications link for details.
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 provides even more airflow at lower restriction than a K&N O/E replacement filter which is 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]

Product Specifications

Air Filter ColorRed
Air Filter Height3.938 in (100 mm)
Air Filter Large End Diameter5.031 in (128 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialSteel
Clamp StyleRegular
Clamps Included1
Intake Pipe Color / FinishBlack
Intake Pipe MaterialFlex Hose
Product Box Height7 in (178 mm)
Product Box Length7 in (178 mm)
Product Box Width7 in (178 mm)
Product Style57i Series International Kits
Replacement FilterRC-5128
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen I
Weight2.1 lb (0.9 kg)

K&N 57-0070 Air Intake Product Reviews

Tuesday, December 22, 2015 - Part 57-0070
Kit came with all parts necessary for an easy install, in less than an hour. Immediate performance improvement in throttle response and acceleration. Noticably deeper exhaust sound going through the gears. Well worth the investment. Completely satisfied.

Bill Blomstrom
Virginia
Thursday, April 24, 2014 - Part 57-0070
Easy to install and instant results. I added this to my 1988 325i and I couldn't be happier with the improvement it made.

JB
Pittsburgh, Pennsylvania
Wednesday, February 26, 2014 - Part 57-0070
So far so good. Definitely noticed improvement in HP and a nice little purr to go with it. Great service as well, as I had to return another product and was refunded easily and efficiently. Thanks.

Dave Scott
Arvada, Colorado