The Audi A4 K&N 57i Series induction kits are specifically designed to allow more air to flow to the engine and will allow a less restricted airflow path than the factory air box. Depending on which engine is under the hood and the available space, these economical kits will take a variety of different forms. Designed to provide power throughout vehicle power band, the increase in engine performance is noticeable compared to a factory air box. The K&N 57i Series induction kits uses open-air filters that provides a lower restriction of airflow which is usually limited by a factory air box. The 57i Series induction kits has even less restriction than the K&N OEM replacement filters which are day and night when side by side to the factory parts. Thanks to precision design, K&N 57i Series induction kits have a larger air filter that is capable of blocking and holding more debris than OEM filters and increases the life between replacement and cleaning to nearly 100,000 miles. The K&N 57i Series induction kitsallows the user to attach its filter directly to the engine carburetor, throttle body or indirectly through a tube assembly that will run from the filter to the engine. K&N adapters are all made from top-quality steel, aluminum, silicon or reinforced nylon to ensure that the 57i Series induction kits maintain their effectiveness for a long life.
The K&N 57i Series induction kits highlights:
- K&N Induction Kits are Engineered to Increase Horsepower and Vehicle Acceleration
- K&N have Specially Designed Kits to Fit Audi Engines
- Installation in Less than 90 Minutes
- Approx. 100,000 Miles Life (Depending on Driving Conditions)
- Million Mile Limited Warranty From K&N
- K&N Kits are Made to Replace the OEM Air Filter
- K&N Makes it Easy to Wash and Reuse Air Filter
- Works with Factory Computer System and Equipment
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