BMW B58 Gen 2 G-Series M340i/M440i/M240i Closed Air Intake

BMW B58 Gen 2 G-Series M340i/M440i/M240i Closed Air Intake

Unlock the full induction sound and airflow potential of your BMW B58TU-powered G-Series platform with this Closed Air Intake System — engineered to maximise airflow, improve turbocharger efficiency, and deliver a refined balance of performance and everyday drivability.

Designed specifically for the 3.0L Turbocharged B58 Gen 2 (B58TU) engine, this intake system replaces the restrictive factory airbox with a high-flow enclosed design that allows the turbocharger to breathe more efficiently while shielding the intake system from engine bay heat. The result is improved throttle response, enhanced turbo spool characteristics, increased airflow capacity, and a more pronounced induction sound.

Manufactured using premium materials and equipped with high-flow performance air filters, the enclosed design helps maintain cooler intake temperatures while preserving OEM-like refinement and reducing unwanted heat soak. Whether you're running a stock vehicle, Stage 1 tune, or a higher-powered setup, this intake system provides an excellent balance of performance, reliability, and aesthetics.

Key Features

Closed Airbox Design

Enclosed intake housing helps isolate the intake system from engine bay heat for improved thermal efficiency.

Increased Airflow Capacity

Optimised intake routing allows the turbocharger to draw air more efficiently for improved performance and responsiveness.

High-Flow Performance Air Filter

Designed to maximise airflow while maintaining excellent filtration and engine protection.

Enhanced Turbo Acoustics

Produces increased turbo spool and induction sounds without excessive cabin noise.

Improved Throttle Response

Reduced intake restrictions allow the engine to respond faster and operate more efficiently.

Premium Construction

Manufactured from high-quality materials for exceptional durability and long-term reliability.

Direct Bolt-On Fitment

Designed specifically for BMW B58 Gen 2 (B58TU) G-Series vehicles using factory mounting points.

Performance Benefits

• Increased airflow to the turbocharger
• Improved throttle response
• Enhanced turbo spool characteristics
• Increased induction and turbo acoustics
• Reduced intake restrictions
• Improved engine efficiency
• Ideal supporting modification for tuned and upgraded turbo applications

Performance gains may vary depending on ECU calibration, fuel quality, and supporting modifications.

Sound Characteristics

Compared to the factory intake system, this Closed Air Intake typically delivers:

• Increased turbo spool noise
• Enhanced induction sound under acceleration
• More pronounced diverter valve acoustics
• Improved overall engine character
• Refined sound characteristics suitable for daily driving

Vehicle Fitment

BMW G20/G21 M340i xDrive (2019+)
BMW G22/G23/G26 M440i xDrive (2021+)
BMW G42 M240i xDrive (2022+)
BMW G29 Z4 M40i (2019+)

3.0L Turbocharged B58 Gen 2 (B58TU) Engine

Please Note

Professional installation is recommended.

Performance gains may vary depending on vehicle condition, ECU calibration, fuel quality, and supporting modifications.

For optimal results, pairing with upgraded turbo inlet pipes, downpipes, and ECU tuning is recommended.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.