Drop-In Performance Air Filters for S58 BMW G80 M3, G82 G83 M4, G87 M2Gain up to 9whp with just the addition of the BMS high flow replacement drop in filters! Burger Motorsports performance S58 G8x BMW drop in air filters exceed OE quality and feature layered, oiled cotton media engineered to have the most improved airflow possible and still capture contaminants while increasing horsepower. Each performance air filter is washable, reusable, and will last the entire life of your vehicle. Installs easily into your factory