Skip to content
Black Friday deals coming soon!
Black Friday deals coming soon!

K&N Performance Intake Kit 57S-4000

by KNN

OUT OF STOCK   Contact us for an ETA.

SKU KN-57S-4000
Have a question on this product?

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. 

  • 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

Replacement Filter E-9289
Air Filter Color Red
Air Filter Material Cotton Gauze
Air Filter Outlet Shape Round
Clamps Included No Clamps Included
Clamp Material Stainless Steel
Clamp Style Regular
Couplers Included None
Type Gen I
Product Style 57i Series International Kits
Air Filter Height 7.688 in (195 mm)
Street Legal In All US States No
TUV Approved (Europe) See Application Link Above
TUV Certificate Number TU-025979-C0-206
Weight 4.2 lb (1.9 kg)
Product Box Height 11.81 in (300 mm)
Product Box Length 15.34 in (390 mm)
Product Box Width 11.81 in (300 mm)
California Restricted Not legal for sale or use in California
Mounting Hardware Included Yes