BMW 4 Series (G22 / G23 / G26) Full Aluminum Semi-Closed Cold Air Intake System | M440i – B58 3.0L Turbo (2021–Present)

Unleash the full performance of your BMW 4 Series M440i 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 is built to perform under heat and boost while adding a clean, motorsport-inspired look under the hood. The aluminum housing is highly resistant to heat soak, ensuring cooler, denser airflow compared to the restrictive factory airbox.

Designed as a semi-closed system, it combines the free-breathing characteristics of an open-cone intake with the protective benefits of a sealed box. By reusing the factory turbo inlet and connecting through a shorter reinforced hose, airflow is more direct and efficient — reducing turbulence and improving throttle response. The result is faster spool, stronger midrange torque, and consistent power delivery across the rev range.

Performance you’ll feel every drive:

1. Sharper throttle response with reduced turbo lag
2. Stronger midrange torque for spirited driving and daily use
3. Faster turbo spool-up for aggressive acceleration
4. Horsepower gains that grow even further with ECU tuning

On top of raw performance, this intake enhances the B58 soundtrack — producing a deep induction growl, crisp turbo spool, and sharp blow-off acoustics that perfectly match the 4 Series’ grand-touring and performance character.

Key Features

• Full aluminum construction – strong, lightweight & highly heat-resistant
• Semi-closed design balances airflow with effective heat shielding
• Reuses factory turbo inlet for OEM-grade reliability
• Shorter reinforced hose creates a smoother, more efficient airflow path
• Sharper throttle response & reduced turbo lag
• Cooler intake temps for consistent horsepower gains
• Aggressive induction tone with amplified spool & blow-off sounds
• Direct OEM fitment for a secure, factory-style installation

FITMENT: Designed for BMW models with the B58 3.0L turbo inline-six, including: G22 M440i Coupe (2021–present), G23 M440i Convertible (2021–present), G26 M440i Gran Coupe (2022–present).

Engine Compatibility: B58B30O1 turbocharged inline-six

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