BMW 3 Series 320i/330i G20 & 4 Series 420i/430i G22 (B48) MST Intake Kit (2018+)Upgrade your vehicles airflow and induction sound with this high performance induction kit. Designed to replace the restrictive factory airbox, this kit improves throttle response and increases power, delivering dyno proven gains of 12 14bhp (results may vary by vehicle). Whether installed on a stock or tuned engine, you can expect noticeable performance enhancements. Key Features: Enhanced Throttle Response Faster acceleration and improved engine