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The Eventuri BMW F40 M135i / F44 M235i / F39 X2 M35i Black Carbon Intake System is engineered to reduce intake restriction and improve airflow delivery to the turbocharger on the transverse-mounted B48 2.0-liter turbocharged engine. Developed through real-world testing and airflow simulation, the system replaces the factory airbox with a patented pre-preg carbon fiber Venturi housing, integrated Mass Air Flow (MAF) sensor section, bespoke Generation 2 dry air filter, and enlarged sealed carbon intake duct. Eventuri reports a 0.2-second reduction in 60–130 mph acceleration.

The factory B48 airbox requires incoming air to change direction approximately 90 degrees before passing through the panel filter, followed by another substantial directional change before entering the MAF sensor section. These transitions introduce additional complexity into the airflow path. Eventuri replaces this arrangement with a reverse-mounted filter inside a carbon fiber Venturi housing, allowing incoming air to travel more directly from the filter inlet toward the MAF section and factory turbocharger inlet tube.

At the center of the system is Eventuri's patented Venturi filter housing, which surrounds a bespoke high-flow Generation 2 dry air filter. The carbon housing gradually reduces in cross-sectional area toward the integrated MAF section, providing a controlled transition between the filtration surface and outlet. This geometry is designed to promote a consistent airflow velocity profile while reducing abrupt changes in direction and cross-sectional area.

The integrated MAF section forms part of the carbon housing assembly and connects to the factory turbocharger inlet tube. By incorporating the sensor passage into the Venturi housing, Eventuri eliminates the need for a separate convoluted transition between the filter assembly and MAF section. The resulting airflow path is intended to reduce inlet restriction and improve the consistency of air delivery to the turbocharger.

Eventuri also redesigned the front intake duct to maximize the internal volume available above the slam panel. The enlarged pre-preg carbon fiber duct supplies ambient air to the filter housing while reducing potential restriction ahead of the filtration element. Its mounting points are concealed within the assembly, allowing the duct to utilize more of the available packaging space.

A flexible rubber sealing edge surrounds the interface between the carbon duct and Venturi housing. This seal helps separate the incoming ambient-air supply from heated engine compartment air while accommodating relative movement between the engine-mounted housing and stationary duct. The arrangement maintains the intended cold-air connection without requiring a rigid joint between the two assemblies.

Aluminum inlet cowls help guide incoming air into the reverse-mounted filter, while application-specific laser-cut stainless steel brackets secure the intake components. The carbon housing and duct are manufactured from pre-preg carbon fiber with a high-gloss black finish, providing a lightweight structure with smooth internal surfaces.

According to Eventuri, the reduced restriction and revised airflow geometry improve throttle response and allow the turbocharger to operate with a lower wastegate duty cycle under the manufacturer's evaluated conditions. Eventuri also reports a 0.2-second reduction in 60–130 mph acceleration, demonstrating a measurable improvement in the tested vehicle's acceleration performance.

The complete system is developed specifically for the packaging and airflow requirements of the BMW F40 M135i xDrive, F44 M235i xDrive Gran Coupe, and F39 X2 M35i. Rather than relying on an exposed cone filter and conventional heat shield, the intake combines a patented Venturi housing with a sealed, high-volume carbon duct to address both inlet restriction and intake air temperature management.

Product Details

• Designed for BMW F40 M135i xDrive, F44 M235i xDrive Gran Coupe, and F39 X2 M35i applications
• Engine application: B48 2.0-liter turbocharged four-cylinder
• Patented Eventuri carbon fiber Venturi filter housing
• Pre-preg black carbon fiber construction with high-gloss finish
• Integrated Mass Air Flow (MAF) sensor section
• Bespoke high-flow Generation 2 dry air filter
• Reverse-mounted filter arrangement for a more direct airflow path
• Gradually reducing internal housing geometry designed to minimize airflow restriction
• Eliminates the abrupt directional changes associated with the factory airbox arrangement
• Enlarged carbon fiber front intake duct with maximized internal volume
• Sealed duct-to-housing interface with flexible rubber edging
• Sealing arrangement designed to accommodate engine movement
• Aluminum inlet cowl for controlled airflow entry
• Two application-specific laser-cut stainless steel mounting brackets
• Developed through real-world testing and airflow simulation analysis
• Manufacturer-reported 60–130 mph acceleration improvement: 0.2 seconds
• Replacement filter: One (1) Eventuri Type S Generation 2 filter, EVE-151-G2-FTR
• Manufacturer part number: EVE-F4XB48-CF-INT