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K&N 57S-4000 5.0 out of 5 stars 2 Customer Reviews
57i Series Kits > Performance Intake Kit

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57S-4000
 
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The K&N 57S-4000 Performance Airbox replaces the restrictive factory air filter and air box lid. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine’s RPM range. The 57S-4000 Performance Airbox comes with an oversized conical K&N high-flow air filter and an injection molded air box lid with the K&N logo embossed on top. The air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This performance air box is relatively easy to install into the air box base with commonly available tools. K&N builds these air box systems to last for the life of your vehicle and they are backed by K&N's Million Mile Limited Warranty. Some K&N 57S Series Performance Airboxes are compliant with the latest TUV emissions and sound regulations. Check the K&N catalog or website for vehicle applications and specific TUV status for each vehicle and air intake.

[More Information on 57S Performance Airbox Systems]
  • Guaranteed to increase horsepower
  • Designed to improve torque and acceleration
  • Replaces entire factory air box and air filter system
  • Washable and reusable lifetime air filter
  • Easy to install, usually in 90 minutes or less
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • K&N Million Mile Limited Warranty


Product Specifications 
Air Filter Color:Red
Air Filter Height:7.688 in (195 mm)
Air Filter Material:Cotton Gauze
Air Filter Outlet Shape:Round
California Restricted:Not legal for sale or use in California
Clamp Material:Stainless Steel
Clamp Style:Regular
Intake Pipe Color / Finish:None
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:57S-4000
Product Box Height:11.81 in (300 mm)
Product Box Length:15.34 in (390 mm)
Product Box Width:11.81 in (300 mm)
Product Style:57i Series International Kits
Replacement Filter:E-9289
Street Legal In All US States:No
TUV Approved (Europe):See Application Link Above
TUV Certificate Number:TU-025979-A0-206
Type:Gen I
Vacuum Tubing Included:No
Weight:4.2 lb (1.9 kg)


Product Reviews      Review part 57S-4000

 I tried the kit 57S-4000 with exchange filter from K&N with the new lid for the air box. Just looking at the product and thinking about the idea of putting in a bigger filter by making a new bigger lid of the air filter is in my world is brilliant. The work putting it on was super easy and with good fittings, and with an easy manual. The performance was noticeably better through all the revs. And the best part of all was that the fuel consumption went down below the car manufacturer’s data. This kit cost a lot, but it really works and it will save you fuel, and by the time it will actually pay it self off. I recommend this K&N kit to all Volvo V40 D2 owners.
Andreas Roger Consitt, Sweden / Lund
 Fitted to 163PS TDCI MK3 Focus, previously used the E-2993 filter in my MK2.5 TDCI Focus, and could have used it in my MK3, but decided I wanted a little more performance and growl from my diesel. Easily fitted, performs great and more so when pushing the car with a Bluefin remap up to 185PS. I have cleaned it once so far and it has been fitted now for 7 months. Well worth the upgrade.
Highlander UK, Scotland