MERCEDES W177 A45 & C118 CLA45

(Fitment: W177 A45 and A45S, C118 CLA45 and CLA45S: M139 Engine)

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 a 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 the turbo spool to be heard more clearly adding to the dynamics of the overall driving experience.

The Eventuri Difference

The Mercedes M139 Eventuri system uses our Patented Carbon fiber 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 that invokes the Venturi effect and maintains laminar flow conditions to reduce the drag on the turbo.

The Eventuri A45/CLA45 intake system consists of a number of components engineered to perform a specific purpose and fabricated to the highest of standards. We use 100% pre-preg carbon fiber with no fiberglass which means we can achieve a smooth internal surface to maintain smoother airflow. Here are the details for each component and the design ethos behind them:

Each intake system consists of:

Carbon Fiber Patented Venturi Filter Housing

Bespoke High Flow Dry Cone Filter

Carbon Fiber Inlet Duct

Laser Cut Stainless Steel Brackets

Laser Cut Stainless Steel ECU Relocation Mount

Patented Venturi Filter Housing Assembly

The M139 filter housing comprises of a bespoke high flow filter, aluminum 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. Further details can be read in the Technology page.

Carbon Fiber Intake Duct

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.

Laser Cut ECU Relocation Bracket

In order to relocate the ECU we have designed a bracket that 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 that supports the filter housing and finally a piece that covers the top of the ECU to protect the wiring harnesses.