How often should I replace my K&N drop-in air filter?K&N drop-in air filters are washable and reusable, designed for long-term performance and only require cleaning at scheduled maintenance intervals.Will a K&N drop-in air filter void my car warranty?Installing a K&N drop-in air filter enhances your engine’s performance and does not void your manufacturer’s warranty when properly installed.K&N Drop-in Air Filters are engineered for superior engine performance, boasting an 8/10 street performance score. Featuring a state-of-the-art design with layered oiled cotton media, these washable and reusable filters capture more contaminants. Trust K&N for an immediate, confident upgrade to your vehicle’s airflow and power.Key Featureswashable reusable High-Flow Air Filtersstate-of-the-art design of layered oiled cotton mediaengineered to improve airflow and capture contaminantsdesigned to provide an increase in horsepowerreusable engineered to last for the entire lifespan of your vehiclebacked by K&N’s 10-Year/Million Mile Limited WarrantyWhy Choose the KN Drop in Air FiltersDelivers sustained power gains and a more responsive throttle for exhilarating drives.Achieves superior engine protection by trapping more harmful particles than standard filters.Provides a noticeable boost in horsepower and torque for quicker acceleration.Transforms your engine’s breathing for optimal performance and efficiency.Who Is This For?Street Performance 8/10Engineered to improve airflow and increase horsepower.Engine Performance 9/10High-flow design improves airflow and captures contaminants.Easy DIY Install 10/10Drop-in install type simplifies installation process.Racing Competition 7/10Designed to provide an increase in horsepower.Track / Autocross 7/10Designed to provide an increase in horsepower.Daily Driving Comfort 6/10Improves airflow, potentially enhancing engine responsiveness.Frequently Asked QuestionsWhat is a K&N drop-in air filter?A K&N drop-in air filter is a washable, reusable High-Flow Air Filter designed to replace your vehicle’s stock air filter directly. It fits 1990-2001 Mercedes-Benz 400E/400SE/400SEL models and many others, offering superior engine protection by trapping more harmful particles. This engineered upgrade transforms your engine’s breathing for optimal performance.How easy is it to install a K&N drop-in air filter?Installation of a K&N drop-in air filter is straightforward due to its drop-in install type, receiving a perfect 10/10 score for Easy DIY Install. The filter is designed to fit seamlessly into your existing airbox. This simplifies the upgrade process for enhanced engine performance.Does a K&N drop-in air filter increase horsepower?Yes, a K&N drop-in air filter is engineered to provide an increase in horsepower, scoring an 8/10 for Street Performance. Its state-of-the-art design of layered oiled cotton media improves airflow and captures contaminants. This results in sustained power gains for exhilarating drives.What is the maintenance for a K&N drop-in air filter?K&N drop-in air filters are washable and reusable, designed for easy maintenance, scoring a perfect 10/10 for Easy DIY Install. You can clean and re-oil the filter to restore its performance. This makes it a sustainable choice, engineered to last the lifespan of your vehicle.Additional ResourcesOfficial K&N Engineering Product PageInstallation Guide (PDF)Important Notices Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.{“@graph”:[{“mpn”:”33-2678″,”sku”:”KNN33-2678″,”name”:”KN Drop in Air Filters”,”@type”:”Product”,”brand”:{“url”:”https://www.knfilters.com”,”name”:”K&N Engineering”,”@type”:”Brand”,”sameAs”:”https://en.wikipedia.org/wiki/K&N_Engineering”},”offers”:{“@type”:”Offer”,”price”:”62.99″,”seller”:{“url”:”https://www.motorsportmayhem.com”,”name”:”Motorsport Mayhem”,”@type”:”Organization”},”availability”:”https://schema.org/InStock”,”itemCondition”:”https://schema.org/NewCondition”,”priceCurrency”:”USD”,”priceValidUntil”:”2027-05-25″},”category”:”Air Filters – Drop In”,”description”:”Delivers sustained power gains and a more responsive throttle for exhilarating drives. Achieves superior engine protection by trapping more harmful particles than standard filters. Designed to provide an increase in horsepower”,”isRelatedTo”:{“name”:”Air Filters – Drop In”,”@type”:”Thing”},”alternateName”:”K&N Drop in Air Filter Horsepower Gain”,”additionalProperty”:[{“name”:”Feature”,”@type”:”PropertyValue”,”value”:”washable reusable High-Flow Air Filters”},{“name”:”Feature”,”@type”:”PropertyValue”,”value”:”state-of-the-art design of layered oiled cotton media”},{“name”:”Feature”,”@type”:”PropertyValue”,”value”:”engineered to improve airflow and capture contaminants”},{“name”:”Feature”,”@type”:”PropertyValue”,”value”:”designed to pr