aFe Magnum FORCE Stage-2Si Cold Air Intake | BMW 3 Series E9x (06-11) (51-81012-C) MODEL_F90 Progressive spring design for excellent

Progressive spring design for excellent ride quality

Whether you're looking to improve exhaust flow

Crafted with precision engineering and backed by Bilstein’s reputation for durability and performance

giving you the flexibility to achieve your desired stance without sacrificing ride quality

and a more responsive feel

aFe Magnum FORCE Stage-2Si Cold Air Intake | BMW 3 Series E9x (06-11) (51-81012-C) MODEL_F90 Progressive spring design for excellentMagnum Force Stage 2 Si Aluminum Carbon Fiber Cold Air Intake System with Pro Dry S Filter (51 81012 C) by aFe. Fully enclosed in a heat shielding molded plastic housing; this air intake system features a washable reusable conical air filter that improves airflow for increased horsepower and torque. The housing features an auxiliary inlet duct for better airflow as well as an attractive black powder coated aluminum cover that provides ready access to