If you're a BMW M3 owner who loves to get the most out of your vehicle, this K&N drop - in air filter is for you. Whether you're on a daily commute or hitting the track on weekends, it's designed to enhance your driving experience. It's made to fit perfectly in the factory air box of 2008 - 2011 BMW M3 4.0L V8 models. No need to worry about size and weight details; it's engineered to be a seamless replacement. With its unique layered, oiled cotton media, it works hard to keep your engine running smoothly and powerfully.