The Mercedes M139 intake for the A45 and CLA45 has been developed to allow the turbo a smoother route for airflow to be drawn from. By redesigning the system to allow for a much more direct path, the turbo is able to generate boost with less drag and therefore reach target boost pressure sooner in the RPM range. This intake system has been developed to offer the highest possible flow rate whilst maintaining the lowest intake temperatures possible to produce a net performance gain. The de-restricted flow path also allows for turbo spool to be heard more clearly adding to the dynamics of the overall driving experience.

The Mercedes M139 Eventuri system uses our Patented Carbon fibre Housing which provides an aerodynamically efficient airflow path from the filter to the turbo. Not just another cone filter with a heat shield but a unique design which invokes the Venturi affect and maintains laminar flow conditions to reduce the drag on the turbo. You can read more about the housing design and how it works

Our M139 intake has been independently tested by a Mercedes specialist tuner in the UK – MSL Performance. Several runs were done with the OEM airbox to get a repeatable result and then again with the Eventuri intake. Tests were done on the same day back to back. Results show an increase in torque and power across the entire RPM range – not just at the peak RPM, which is why the car feels more responsive and is able to accelerate faster through the gears.

The M139 filter housing comprises of a bespoke high flow filter, aluminium cowl and the carbon pod itself. The carbon pod shrouds the reverse mounted filter and smoothly shape the airflow down to the intake tubes. This smooth reduction in cross sectional area invokes the Venturi effect where the airflow accelerates whilst maintaining laminar conditions. It can be thought of as a large velocity stack – below is a diagram to show the comparison between our patented design and a regular intake system.

The duct channels ambient air from the slam panel area to the filter housing. It fits inside the OEM ducting system and smoothly transitions to the circular filter housing shape. In order to ensure a good seal against engine bay heat – it also has a flexible rubber edging around the opening which presses against the filter housings creating the desired seal yet allowing the housing to move with the engine. The side of the duct has some cut outs which allow air movement around where the ECU is now relocated to aid with heat saturation. The duct was designed to have the maximum internal volume possible within the given geometry of the engine bay. This ensures that the filter housing is able to draw with minimum restriction.

In order to relocate the ECU we have designed a bracket which is laser cut from stainless steel for strength and rigidity. The ECU securely mounts into this bracket which is then secured to the chassis of the car using the stock locating threads used for the OEM airbox bracket. In addition, there is another bracket which supports the filter housing and finally a piece which covers the top of the ECU to protect the wiring harnesses.

Mercedes A45 AMG (2019-ONWARDS)

Carbon Fibre Patented Venturi Filter Housing
Bespoke High Flow Dry Cone Filter
Carbon Fibre Inlet Duct
Laser Cut Stainless Steel Brackets
Laser Cut Stainless Steel ECU Relocation Mount

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