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

Unleash the performance of your BMW M340i (G20 Sedan, G21 Touring, G22 Coupe) with our Carbon Fiber Semi-Closed Cold Air Intake System, designed for the B58 3.0L turbocharged inline-six.

Built from premium lightweight carbon fiber, this intake blends motorsport-inspired styling with high thermal resistance. The woven carbon finish not only keeps weight to a minimum but also complements the M340i’s sporty, aggressive character with an engine bay upgrade that looks as good as it performs.

This system is engineered as a semi-closed intake, offering the raw airflow of an open design while protecting the filter from excessive engine bay heat. By reusing the factory turbo inlet, it ensures OEM reliability while connecting through a shorter reinforced hose, which reduces turbulence and provides a more direct path to the turbo. The result is faster spool, improved throttle response, and cooler intake temps compared to the stock airbox.

Expect real-world improvements:

1. Sharper throttle response with reduced turbo lag
2. Quicker spool-up and stronger midrange torque
3. Horsepower gains that scale with ECU tuning
4. Deep induction sound with crisp turbo spool and blow-off acoustics

With its reinforced couplers, clamps, and precision-fit housing, this carbon fiber intake is built to handle high boost levels, track days, and spirited driving while maintaining long-term reliability.

Key Features

• Carbon fiber construction – lightweight, durable & heat-resistant
• Semi-closed design balances unrestricted airflow with heat shielding
• Reuses factory turbo inlet for OEM-grade reliability
• Shorter reinforced hose ensures smoother, more efficient airflow
• Sharper throttle response & stronger torque curve
• Cooler, denser intake temps for repeatable performance
• Motorsport-inspired induction tone with amplified turbo spool & blow-off sounds
• Direct OEM fitment with secure installation

FITMENT: Designed for BMW models with the B58 3.0L turbo inline-six, including: G20 M340i Sedan (2019–present), G21 M340i Touring (2019–present), G22 M340i Coupe (2020–present).

Engine Compatibility: B58B30O1 turbocharged inline-six

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