K&N 57i Series Performance Air Intake Kit for 2000-2004 Audi A4 (1.8L) 150BHP - 57-0593

Fits 2000-2004 Audi A4 and A4 Quattro models (1.8L).

The K&N 57i Series induction kit is engineered to eliminate the airflow restrictions caused by the factory air box. By replacing the entire OE intake housing with a high-flow open-air filter, this system allows your 1.8L turbo engine to breathe more efficiently. The increased surface area of the conical filter media provides higher volume airflow at lower restriction compared to a standard drop-in filter, supporting improved induction throughout the RPM range.

This kit features durable adapters and components made from materials like reinforced nylon, aluminum, or silicon to ensure a secure fit and long-term reliability. The oversized filter also has a higher dirt capacity than standard filters, extending service intervals up to 100,000 miles under normal driving conditions. This is a direct-fit performance upgrade designed for enthusiasts looking to optimize induction efficiency.

• Manufacturer Part Number: 57-0593
• Increases airflow by removing factory air box restrictions
• High-flow, washable, and reusable air filter media
• Durable construction with application-specific hardware and adapters
• Service interval: up to 100,000 miles before cleaning required
• K&N Million Mile Limited Warranty
• Emissions Note: Not legal for sale or use in California or states adopting California emission standards

Vehicle Fitment: