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 2 Series • 2022+ G42 B58 M240i /M240i xDrive
• BMW 3 Series • 2019-2025 G20 G21 B58 BMW M340i and M340i xDrive
• BMW 4 Series • 2021-2024 G22 G23 G26 Gen 2 B58 BMW M440i and M440i xDrive including Gran Coupe
• BMW 5 Series • 2017-2024 G30 G31 GEN2 B58 BMW 540i including xDrive
• BMW 7 Series • 2016-2024 G11 G12 Gen2 B58 BMW 740i including xDrive
• BMW 8 Series • 2019+ G15 G14 GEN2 B58 BMW 840i including Gran Coupe and xDrive

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.