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It is so good at cleaning greasy dirt and grime that it can also be used as an industrial strength degreaser by removing deposits from most surfaces including cotton air filters
Each filter is specifically designed to withstand the service intervals recommended by vehicle manufacturers
ideal for track cars or big HP engines with external oil coolers etc
Note: Only 2019-2021 E90 ECMs are currently accepted
One K&N replacement air filter costs less than replacing disposable air filters over and over again
33-2059 K&N Replacement Air Filter, BMW 318/ 325/ 525/ 528/ 750 SQ2 It is so good atK&N washable, reusable High Flow Air Filters feature a state of the art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's No Hassle Lifetime Limited Warranty. K&N drop in replacement filters are designed to install easily into your