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

Unlock the performance of your BMW 3 Series M340i with our Full Aluminum Semi-Closed Cold Air Intake System, engineered for the B58 3.0L turbocharged inline-six. Constructed from lightweight, high-strength aluminum, this intake system is built to withstand heat and boost while adding a motorsport-inspired look under the hood. Unlike the restrictive OEM airbox, the semi-closed design provides the free-flowing airflow of an open intake while still shielding the filter from excessive engine bay heat. The result is cooler, denser air that consistently feeds your turbo for reliable power. This intake is designed to reuse the factory turbo inlet, ensuring OEM fitment and reliability. By connecting through a shorter reinforced hose, it reduces turbulence and shortens the airflow path to the turbo, resulting in faster spool, sharper throttle response, and stronger midrange torque. Performance gains you’ll notice daily: Sharper throttle response with reduced turbo lag Improved turbo spool for