Air intake for BMW M440i G22 G23 G26 B58 (2021-2024) 3.0L

High-Flow Cold Air Intake System for 2021-2024 BMW 4 Series (B58 / G22 G23 G26)

Replaces the restrictive factory air box with a high-velocity aluminum intake tract and 360-degree filter to lower intake temperatures and increase volumetric efficiency.

The Stock 4 Series Intake Deficiencies

The factory BMW B58 intake system is engineered primarily for Noise, Vibration, and Harshness (NVH) suppression rather than maximum airflow. The OEM airbox utilizes a thick, pleated paper element and a baffled plastic resonator that creates significant internal turbulence and pneumatic restriction at higher RPMs. Furthermore, the factory plastic construction is highly susceptible to heat soak during spirited driving or in high-ambient conditions. This thermal absorption leads to elevated Intake Air Temperatures (IATs), causing the ECU to pull ignition timing to prevent knock, which effectively kills power. The closed-box design also completely masks the natural spool and diverter valve acoustics of the B58 twin-scroll turbocharger.

The Engineering Solution

This performance intake kit utilizes large-diameter, mandrel-bent aluminum piping to provide a smooth, consistent internal path, minimizing air drag into the turbo inlet. The heart of the system is a 360-degree inverted cone dry-flow filter, which significantly increases the surface area for filtration without the high-pressure drop associated with stock paper media. To combat thermal efficiency losses, a precision-cut heat shield is included to isolate the filter element from the radiant heat generated by the engine block and exhaust manifold, ensuring a denser, oxygen-rich air charge. By optimizing the airflow geometry and reducing vacuum restriction, this system allows the B58 to breathe more efficiently, resulting in dyno-verified gains of up to 16hp and 28nm of torque while sharpening throttle response.

Technical Specifications

Compatibility

• BMW 4 Series • 2021-2024 G22 G23 G26 Gen 2 B58 BMW M440i and M440i xDrive (Coupe, Convertible, and Gran Coupe)

The BMW Precision Caliber

Engineered specifically for the G-chassis platform, this intake system maintains factory Mass Air Flow (MAF) sensor scaling to ensure no Check Engine Lights (CEL) or fuel trim issues. It provides the mechanical precision required for European performance standards while delivering a more aggressive, sporty induction sound under load.

Common Questions

Will this cold air intake fit my 2021-2024 BMW M440i Gran Coupe or xDrive?
Yes, this intake system fits all 2021-2024 BMW 4 Series M440i and M440i xDrive models equipped with the 3.0L Gen 2 B58 engine, including the G22 Coupe, G23 Convertible, and G26 Gran Coupe.

Which engine is this intake built for?
This system is engineered specifically for the 3.0L Gen 2 B58 inline-6 engine found in the 2021-2024 BMW M440i and M440i xDrive.

What components are included in the kit?
The kit includes mandrel-bent aluminum intake piping, a 360-degree inverted cone dry-flow air filter, and a precision-cut heat shield to isolate the filter from engine bay heat.

What kind of performance gains can I expect?
By replacing the baffled factory airbox and paper filter with a smooth aluminum tract and high-flow 360-degree filter, this system delivers dyno-verified gains of up to 16 hp and 28 Nm of torque along with sharper throttle response.

Does installing this intake require custom tuning?
The intake tract maintains factory Mass Air Flow (MAF) sensor scaling, allowing it to bolt on and run properly on stock software without fuel trim issues.