New Release: Eventuri Hybrid Carbon Airbox System for the BMW E46 M3
Ryan Morgan October 27, 2025
After two years of focused development, Eventuri has released the Hybrid Carbon Airbox System for the BMW E46 M3. This system delivers the exhilarating CSL induction sound that enthusiasts love while retaining MAF compatibility for smooth, OEM like driveability. There is no need for Alpha N conversion or retuning. Owners can enjoy CSL sound and proven performance gains in a true plug and play solution.
Available Configurations
- EVE-E46ABX-CF-INT Hybrid Carbon Airbox with Full Eventuri Intake
- EVE-E46ABX-CF-PLM Hybrid Carbon Airbox Only for existing Eventuri intake owners
Eventuri developed the Hybrid Airbox System to support both new customers and those already running an Eventuri intake. The design is focused on maximizing flow efficiency, improving throttle response, and maintaining long term structural integrity in a high heat environment.
Full Hybrid Airbox + Intake Includes
- Carbon fiber main airbox
- Carbon fiber snorkel with integrated MAF tube
- Six thermoplastic molded trumpets with CNC stainless reinforcement rings
- Carbon fiber filter housing with bespoke dry high flow filter
- Carbon fiber cold air scoop
- Stainless steel brackets and flanges
- CNC machined breather adapters
- Custom EPDM flexible coupler
- Silicone couplers
- Crankcase breather hose and vacuum tubing
Main Airbox Assembly
The prepreg carbon main airbox is shaped to resonate under load and produce the signature CSL tone. Mechanical fastening and gasket interfaces ensure a reliable long lasting seal even under repeated heat cycles and vibration.
The trumpets are injection molded from glass fiber reinforced thermoplastic. This manufacturing process ensures precise geometry and smooth internal flow paths. CNC stainless reinforcement rings prevent deformation when couplers are tightened.
Airbox Snorkel
The snorkel channels airflow to the trumpet chamber and houses the factory MAF sensor in a CNC machined mounting boss. Custom fasteners prevent vibration related loosening.
CFD Optimised Flow
The Hybrid Airbox geometry was refined through CFD analysis to ensure uniform airflow distribution and prevent flow starvation during high RPM operation.
Intake Housing Assembly
Eventuri’s patented reverse mounted filter eliminates the restrictive OEM airflow path and ensures smooth airflow as it enters the MAF section. The goal is to reduce pressure loss and maintain accurate MAF readings.
Patented Venturi Technology
The filter housing reduces cross sectional area smoothly to accelerate airflow while maintaining laminar characteristics. This creates a velocity stack effect that increases mass airflow efficiency and throttle response.
Cold Air Scoop
The prepreg carbon scoop feeds cold ambient air to the intake opening while allowing brake cooling airflow to continue through the duct. Even after spirited driving the intake cowl remains cool to the touch.
Full Assembly Views
Dyno Tested Performance
Performance Increase with OEM ECU tune: 20 to 22 HP and 8 to 13 Ft-Lb.
Presenting a World first, the Eventuri Hybrid Airbox System. This breakthrough solution delivers the aggressive CSL induction note with seamless OEM-like driveability. Historically, owners needed to remove the MAF sensor and perform tuning changes to achieve this sound which could compromise throttle response. The Hybrid Airbox produces the CSL experience without requiring any remap and maintains smooth power delivery throughout the rev range.
| Setup | Max Power | Max Torque | Power Gain | Torque Gain |
|---|---|---|---|---|
| Eventuri Hybrid Airbox | 342.2 HP | 274.4 Ft-Lb | +20 to +22 HP | +8 to +13 Ft-Lb |
| Stock Airbox | 320.1 HP | 266.1 Ft-Lb | Baseline | Baseline |
- Significant gains in the mid range with stronger pull from 3500 to 5500 rpm
- Improved high rpm performance where the factory airbox tapers off
- No tune required for additional power
- Maintains MAF sensor functionality and OEM driveability
Configuration and Cost Breakdown
Reference guide for selecting the correct configuration based on intake components already installed.
The Hybrid Airbox allows the S54 to breathe more efficiently while retaining the driving refinement that BMW intended. It is a genuine upgrade for owners who want CSL emotion without compromises.
Available Now at IND Distribution
Both configurations are in stock and available to order. Contact IND Distribution for help selecting the correct option for your build.
