What are the primary benefits of using a K&N drop-in air filter for my BMW 335i?K&N drop-in air filters deliver enhanced engine breathing for a more responsive throttle and provide a noticeable horsepower gain for exhilarating acceleration.How does a K&N drop-in air filter improve engine performance?This washable reusable high-flow air filter features state-of-the-art layered oiled cotton media engineered to improve airflow and capture contaminants for superior engine protection.K&N Drop-in Air Filters for your 2012-2019 BMW 335i are engineered to provide an increase in horsepower, boasting a top score of 9 for Engine Performance. Featuring a state-of-the-art design of layered oiled cotton media, these filters are washable and reusable for the entire lifespan of your vehicle. Trust K&N for an undeniable enhancement to your BMW’s breathing and acceleration.Key Featureswashable reusable High-Flow Air Filtersstate-of-the-art design of layered oiled cotton media engineered 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 Warrantydesigned to install easily into your factory air boxWhy Choose the KN Drop in Air FiltersDelivers enhanced engine breathing for a more responsive throttle.Achieves superior filtration, protecting your engine from damaging debris.Provides a noticeable horsepower gain for exhilarating acceleration.Transforms your driving experience with long-lasting, reliable performance.Who Is This For?Street Performance 8/10Improves airflow and designed for horsepower increase.Track / Autocross 8/10Designed for improved airflow and horsepower gains.Drag Racing 7/10Potential for horsepower increase aids acceleration.Engine Performance 9/10Oiled cotton media improves airflow and captures contaminants.Easy DIY Install 9/10Designed to install easily into factory air box.Racing Competition 7/10Designed for improved airflow and horsepower gains.Frequently Asked QuestionsWhat does a K&N drop-in air filter do for my BMW 335i?A K&N drop-in air filter enhances your BMW 335i’s engine breathing for a more responsive throttle. Engineered with state-of-the-art oiled cotton media, it achieves a high score of 9 for Engine Performance by improving airflow and capturing contaminants. This upgrade transforms your driving experience with reliable performance.How easy is it to install a K&N drop-in air filter?Installing a K&N drop-in air filter is designed for an easy DIY installation. Its drop-in install type allows it to fit directly into your factory air box, achieving a score of 9 for Easy DIY Install. You can confidently upgrade your vehicle’s air filtration system yourself.Will a K&N drop-in air filter increase horsepower in my BMW 335i?A K&N drop-in air filter is designed to provide an increase in horsepower for your BMW 335i. It scores an 8 for Street Performance and Track / Autocross usage cases by improving airflow for exhilarating acceleration. Experience a noticeable gain in power with this performance upgrade.What is the warranty on a K&N drop-in air filter?K&N drop-in air filters are backed by K&N’s 10-Year/Million Mile Limited Warranty. This extensive warranty underscores the product’s long-lasting, reusable engineering for reliable performance. You can trust in the durability and quality of this automotive component.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”:”33-2997″,”sku”:”KNN33-2997″,”gtin”:”024844311238″,”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”},”image”:”https://d32vzsop7y1h3k.cloudfront.net/a511d0bb3a79d108524e31de6b0f3aa8.JPG”,”offers”:{“@type”:”Offer”,”price”:”68.99″,”seller”:{“url”:”https://www.motorsportmayhem.com”,”name”:”Motorsport Mayhem”,”@type”:”Organization”},”availability”:”https://schema.org/InStock”,”itemCondition”:”https://schema.org/NewCondition”,”priceCurrency”:”USD”,”priceValidUntil”:”2027-05-27″},”category”:”Air Filters – Drop In”,”description”:”Delivers enhanced engine breathing for a more responsive throttle. Achieves superior filtration, protecting your engine from damaging debris. Designed to provide an increase in horsepower”,”isRelatedTo”:{“name”:”Air Filters – Drop In”,”@type”:”Thing”},”alternateName”:”K&N Drop in Air Filter Engine Horsepower”,”additionalProperty”:[{“name”:”Feature”,”@type”:”PropertyValue”,”value”:”washable reusable High-Flow Air Filters”},{“name”:”Feature”,”@type”:”PropertyValue”,”value”:”state-of-the-art design of layered oile