K&N 57i Generation II Induction Kits are built primarily for European vehicles and use only nonmetallic 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 the engine, which translates into power. 57i intakes are not legal for use in California and other US states that have adopted California emission standards.
Designed to increase horsepower
Designed to improve throttle response and engine sound
Replaces entire factory air intake system
Lasts up to 100,000 miles before service is required, depending on driving conditions
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