Cold Air Intake for BMW M240i M340i M440i B58 (2021-2026) 3.0L

High-Flow Carbon Fiber Cold Air Intake for 2021-2026 BMW M240i, M340i, M440i (B58 3.0L)

What it Does: This carbon fiber cold air intake replaces the restrictive factory airbox and corrugated piping to lower intake air temperatures, delivering verified gains of 12-14 horsepower and sharper throttle response.

The Stock BMW Induction Weakness

OEM BMW intake systems utilize baffled plastic airboxes and corrugated inlet tubes designed primarily to suppress induction noise rather than optimize velocity. This baffling creates internal turbulence, disrupting the laminar flow required by the turbocharger's compressor wheel. Furthermore, standard factory plastic enclosures are highly susceptible to heat soak within the cramped G-chassis engine bay. As under-hood temperatures rise during spirited driving or track use, the OEM system ingests hotter, less dense air. This forces the ECU to pull timing, ultimately reducing overall engine output and throttle crispness.

The Engineering Solution

This intake system resolves these airflow restrictions by utilizing a smooth 4-inch carbon fiber intake pipe coupled with a high-capacity 4-inch dry cone filter. The carbon fiber construction provides superior thermal resistance compared to OEM plastics, drastically reducing heat transfer to the intake charge. By eliminating the factory resonators and utilizing a straight-through, large-diameter structural design, this kit increases total airflow volume and stabilizes velocity. The dry synthetic filter media maximizes particulate filtration without relying on oil, preventing mass airflow (MAF) sensor fouling. The result is a denser oxygen charge, quicker turbo spool, and a pronounced, aggressive induction tone without triggering check engine lights.

Technical Specifications

Compatibility

• BMW B58 3.0L Turbo
• 2021-2026 M340i / M340i xDrive (B58 3.0L G20 Sedan, Non-US G21 Touring)
• 2022-2026 M240i / M240i xDrive (B58 3.0L G42 Coupe)
• 2021-2026 M440i / M440i xDrive (B58 3.0L G22 Coupe, G23 Convertible, G26 Gran Coupe)

The BMW Precision Standard

Engineered specifically for the demands of European performance vehicles, this system ensures flawless sensor integration and CEL-free operation. It delivers consistent, repeatable power curves while maintaining the rigorous precision required by modern BMW engine management.

Common Questions

Will this fit my 2021-2026 BMW M240i, M340i, or M440i with xDrive?
Yes, this cold air intake fits both rear-wheel-drive and xDrive all-wheel-drive versions of the G42 M240i (2022-2026), G20/G21 M340i (2021-2026), and G22/G23/G26 M440i (2021-2026) equipped with the B58 3.0L turbocharged inline-six.

Does this intake fit the BMW M2, M3, or M4?
This system is engineered specifically for the single-turbo B58 3.0L engine found in the M240i, M340i, and M440i. The full-M models (G87 M2, G80 M3, and G82 M4) use the twin-turbo S58 engine, which requires a dedicated dual-inlet intake setup.

What is included in this intake system?
The kit features a smooth 4-inch carbon fiber intake pipe paired with a high-capacity 4-inch dry synthetic cone filter designed to replace the restrictive factory plastic airbox and corrugated inlet tubing.

Does the filter require oiling after cleaning?
It uses a dry synthetic filter media that maximizes airflow and filtration without filter oil, which helps prevent mass airflow (MAF) sensor fouling.

What kind of performance gains can I expect?
By eliminating the factory resonators and reducing heat soak with a straight-through 4-inch carbon fiber design, this intake delivers verified gains of 12-14 horsepower along with quicker turbo spool and sharper throttle response.