Eventuri E46 M3 Hybrid Carbon Airbox System for 2001-2006 BMW E46 M3

Performance Increase with OEM ECU tune: 20-22hp, 8-13ft-lb

Introducing the Eventuri Hybrid Airbox System, a revolutionary intake system for the venerable BMW E46 M3 that is a world first. This system combines the smooth driveability and plug-and-play ease of a conventional intake with the aggressive, race-inspired sound of the CSL Airbox. Up until now, owners of E46 M3s who wanted the sound of the CSL airbox had to make the tradeoff of operating the engine without the MAF sensor, which sometimes resulted in costly ECU conversions or remaps that had a detrimental effect on driveability and throttle response. This issue is resolved with our Hybrid Airbox, which offers the driveability and seamless performance delivery of a standard intake together with the sound and power of a CSL airbox without the need for a remap.

Our patented Venturi Carbon Fiber Housing, which is used in the airbox, creates an aerodynamically effective airflow route. Not just any cone filter with a heat shield, but one with a special design that lowers engine drag by maintaining laminar flow conditions and triggering the Venturi effect.

COMPLETE PACKAGE

We are providing all the parts required to install the airbox and get the car on the road. Usually with CSL style airboxes, there are additional parts required such as the ECU tune and breather pipes. Since our airbox uses the OEM MAF Sensor, there is no need for an aftermarket tune and we also provide the breather hoses. Here is a cost breakdown of additional parts required for CSL style airboxes. The only part required would be the SMG reservoir relocation kit.

MAIN AIRBOX ASSEMBLY

The Main airbox section houses the 6 trumpets as well as the breather system connectors. Made from prepreg carbon fiber, the airbox has been designed to resonate under load and produce the sought after CSL sound. One of the challenges of the construction was to ensure the long-term reliability of the interface between the trumpets and the airbox. This was resolved by using mechanical fasteners and gaskets to ensure an airtight seal which would not be affected by heat cycles and vibrations. A similar method was also used for the breather adapters.

The trumpets have been made with a glass fiber reinforced thermoplastic. The injection molding process ensures accuracy while keeping the inside surfaces smooth for airflow. This was more advantageous over making each one in carbon fiber as we can ensure perfect form for each trumpet with an accuracy not attainable with carbon. We also added CNC machined stainless steel rings to the trumpets to ensure that they do not deform when the silicon couplers are tightened onto them.

AIRBOX SNORKEL

The snorkel or lid of the airbox smoothly channels airflow from the intake to the trumpet area. This section also incorporates the MAF tube section where the OEM sensor is secured to a CNC machined MAF boss. The snorkel secures to the main airbox section using custom made screws which cut into plastic securing clips ensuring that they do not come loose under vibration.

Dyno Testing:

Dream Automotive in the UK has conducted independent dyno testing on this intake. Multiple runs were made with each setup, and tests were conducted back-to-back against the factory airbox. The smoother route via the intake and airbox to the throttle bodies is responsible for the steady increase shown in the dyno results across the RPM range. The car pulls considerably more eagerly to the redline on the road thanks to the performance boost, which also results in enhanced part throttle and full throttle responsiveness.