The filter housings comprise of our bespoke generation 2 filters, aluminium inlet cowls and stainless steel brackets. The carbon pod shrouds the reverse mounted filter and smoothly shapes the airflow down to the tube section which then connects to the turbo tubes. This changes the flow path from the OEM airbox where airflow enters the front of the airbox, changes direction by 90 degrees to travel through the panel filter and then changes direction again by 90 degrees to move through the tube section. Our system is a lot more direct with airflow entering the front of the filter housing and and moving into the tube section without any abrupt direction changes. The result is a smoother path from the filter to the turbo inlet tube and therefore the turbo is able to function with less drag.

In order to achieve the highest flow rate possible we designed a new filter element to make as much use of the space available in the engine bay as possible. This new filter has an outside diameter of 192mm or 7.6" and when flow tested with a housing using a 4" opening is able to flow up to 900 CFM at 28" H2O. The filter medium is ISO tested to ensure that filtration is in line with OEM standards and is also dry. The filter is constructed with our signature flow cones to aid in the Venturi housing principle.

The biggest restriction in the stock system are the turbo inlets. The G8X M3/M4 has an inlet for each turbo and we were able to significantly increase the sizes of both of them. By increasing their sizes, the turbos are able to pull in air with less restriction hence allowing for a quicker spool. In the following photos you can see the differences in the sizes. Although the benefit may be small for a stock car, we expect these larger inlets to be more beneficial for higher states of tune where the target boost pressures are increased.

To ensure that the intake is fully sealed, the filter housings are mated to these carbon ducts which route cold air from the stock entry locations behind the headlamps. Made from prepreg carbon fiber, the ducts ensure that the engine bay heat is blocked from entering the filters. Simply having heat shields would not work as effectively since they cannot be air tight. There are many small details designed into the ducts such as the machined mounts to secure them to the stock airbox locations and the laser cut bracket work.

The filter housing on the right side of the engine is connected to a long tube to route the airflow to the turbo inlet. Our carbon tube replaces the stock version and has a smoother internal profile with a larger volume. At the filter side it starts with an internal diameter of 4" and maintains this size up to the turbo inlet where is smoothly tapers down. The tube features integral brackets which help to secure the tube in a fixed location.