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K&N 57I-4000 5.0 out of 5 stars 1 Customer Review
57i Series Kits > Performance Intake Kit

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57I-4000
 
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K&N 57i Generation II Induction Kits are built primarily for European vehicles. They come with K&N's Million Mile Limited Warranty™. These intake kits use only non-metallic rotationally molded tubes that can reduce air temperature and decrease intake sound over a metal tube. Restriction can exist BETWEEN an air filter and the engine reducing the benefit of a K&N Air Filter alone. The weakest link in the airflow "chain" robs a vehicle of its natural horsepower. Often that weak point is the factory air path leading to the engine. K&N Air Intake Kits virtually eliminate air path restriction by replacing the air filter and the entire air path to the engine. The aerodynamically engineered tube drives a massive amount of air into an engine, which translates into POWER. 57i Intakes are not legal for use in California and other US States adopting California emission standards.

[More Information on 57i Air Induction Kits]
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Replaces entire factory air intake system
  • Not legal for highway use in US 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®
Available Information
Installation Instruction Sheet
57I-4000 Vehicle Applications


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:Stainless Steel
Clamp Style:Mini
Clamps Included:7
Couplers 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:57I-4000
Product Box Height:12.5 in (318 mm)
Product Box Length:22.25 in (565 mm)
Product Box Width:14.25 in (362 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 II
Vacuum Tubing Included:Yes
Weight:9.8 lb (4.4 kg)


Product Reviews      Review part 57I-4000

 Bought this for my 2002 Subaru Legacy. First off this will fit our beloved 3rd Gens!! The package comes with all the mounting gear needed to make this work. Plus it has couplers and clamps to ensure a snug fit to the breather hose and throttle body. The L brackets will help secure the heat shield. Just take your time to check fitment and overall stability. Finally our air flow sensors are MAP based so no worries with a check engine light or bad idling issues. Car background includes [brand] headers, high flow cat, and customer 2.5 cat back exhaust.
Jason Swartzbaugh, Pennsylvania