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 quicker acceleration
• Stronger midrange torque for both daily and spirited driving
• Horsepower gains that increase even further with ECU tuning

Beyond the numbers, this intake enhances the M340i’s driving character with a deeper induction growl, pronounced turbo spool, and refined blow-off acoustics that deliver a more engaging experience behind the wheel.

Key Features

• Full aluminum construction – lightweight, strong & heat-resistant
• Semi-closed design balances unrestricted airflow with heat shielding
• Reuses factory turbo inlet for OEM-grade reliability
• Shorter reinforced hose improves airflow efficiency & turbo response
• Sharper throttle response & reduced lag
• Cooler intake temps for consistent, repeatable performance
• Aggressive induction tone with amplified spool & blow-off sounds
• Direct OEM fitment with factory-style mounting points

FITMENT: Designed for BMW models with the B58 3.0L turbo inline-six, including: G20 M340i Sedan (2019–present), G21 M340i Touring (2019–present).

Engine Compatibility: B58B30O1 turbocharged inline-six

Please refer to the “Fitment” section in the product description for compatibility details.