BMW 3 Series (G20/G21) Full Aluminum Semi-Closed Cold Air Intake System with Turbo Inlet Ducting | M340i – B58 3.0L Turbo (2019–Present)

Unleash the full potential of your BMW 3 Series M340i (G20/G21) with the Full Aluminum Semi-Closed Cold Air Intake System, precision-engineered for the B58 3.0L turbocharged inline-six. Crafted from lightweight, high-strength aluminum, this intake is built to perform under intense boost and heat conditions — all while giving your engine bay a clean, motorsport-inspired look. Aluminum construction resists heat soak better than plastic, ensuring a steady flow of cooler, denser air compared to the restrictive factory airbox. Engineered as a semi-closed system, it perfectly balances the free-breathing performance of an open intake with the protection and heat control of a sealed housing. The included turbo inlet and upgraded ducting replace your worn factory setup for improved airflow and efficiency. By shortening the air path and minimizing turbulence, you’ll experience sharper throttle response, quicker turbo spool, and stronger midrange torque. Performance Benefits Sharper throttle res