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. Further details can be read in the Technology page.

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.