DeutschTuning proudly offers aFe Magnum FORCE Stage-2Si Cold Air Intake System BMW M3 (E90) 08-13. Draw more attention under your hood with this carbon fiber accented cold air intake system. Its sealed housing delivers 29% more cold air to your V8 than your M3s stock configuration. With a unique filter-to-housing interface and minimal parts, this system is a breeze to install. Measured flow: 685 CFM. No cutting or drilling on factory parts for an easy installation. Enjoy lifelong performance with a washable and reusable Pro DRY S air filter