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57i Series Kits > Performance Intake Kit

 List Price: $259.55
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57-0425
 
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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 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 Color:Red
Air Filter Height:6 in (152 mm)
Air Filter Large End Diameter:5.375 in (137 mm)
Air Filter Material:Cotton Gauze
Air Filter Outlet Shape:Round
Base Outside Diameter:5.375 in (137 mm)
California Restricted:Not legal for sale or use in California
Clamp Material:Steel
Clamp Style:Regular
Clamps Included:2
Flange Inside Diameter:4 in (102 mm)
Flange Length:0.625 in (16 mm)
Flange Type:Centered
Height:6 in (152 mm)
Intake Pipe Color / Finish:Black
Intake Pipe Ports:All intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter Included:Mass Air Flow Sensor Adapter Included When Required
Part Number:57-0425
Product Box Height:9 in (229 mm)
Product Box Length:9 in (229 mm)
Product Box Width:9 in (229 mm)
Product Style:57i Series International Kits
Replacement Filter:RC-4550
Street Legal In All US States:No
Top Material/Finish:Chrome
Top Outside Diameter:4.5 in (114 mm)
Top Style:Metal
TUV Approved (Europe):No
Type:Gen I
Vacuum Tubing Included:No
Weight:3.1 lb (1.4 kg)


Customer Feedback      Be the first to review part 57-0425

Dear K&N,

I own a 2002 Volkswagen Bora 1.9 TDi Sport 150 with 85,000 miles on the clock. It's a high miler as I use it pretty much every day for work and I need to travel about rather a lot. The car is pretty quick but had developed a flat spot around the 800 to 1800rpm spot. In an effort to fix it, I purchased one of your replacement air filters (P/N 33-2128). It arrived yesterday and despite the rain, I went out and fitted it straight away, removing the extremely grotty original filter plus general muck and leaves from the air box in the process. And, of course, went out for a test drive to see if it had worked.

So, did it fix the flat spot? Hell, yes! It also enormously improved throttle responsiveness and there was a very noticeable increase in power with much better acceleration. My Bora felt like the sporty diesel it should have been in the first place! I managed to scare myself silly by activating the traction control system in *4th* while accelerating out of a corner. Now, that has *never* happened before!

I definitely recommend fitting one of your filters and only wish I'd done it earlier. Now, how do I claim for soiled underwear ..? :)

Thanks K&N!

P.S. Why aren't your filters fitted as standard equipment?
James McGregor, Islay, UK
I have tried K&N Air Filter (E-2999) in my 2013 Audi A8 3.0L fuel type and I have really noticed the difference in terms of performance, initial torque and even horsepower. When you start accelerating, you can hear the air flowing through K&N filter and it really sounds good. Moreover, I can estimate the increase in hp to be around 30 hp which is great by only replacing the original air filter to K&N. Note: make sure to ask you car service provider if you are allowed to use them or not in order to not lose the car warranty. In my case, I usually remove them before the sending my car for routine checks.
Majed, Saudi Arabia
I learned today that you collect 1MMC (one Million Miles Cars). I have in my Volkswagen T5 2.5l 174hp from January 2006 the K&N from the beginning and well no 1 Million miles but 1 Million 75,000 km with the first engine! All our other cars do have K&N filters and nearly every customer gets one. No troubles everybody is happy. Thanks for such a reliable product!
G. Wimmer , Solingen Germany