Quote:
Originally Posted by aerobod
On my M2, I can put my fingers into the BMW intake at the side of the radiator, so the air is reaching the intake mainly through the grilles. The aftermarket intake has to take the same path around the edge of the radiator, but just has a more restrictive cross section at that point, so will restrict maximum airflow into the OEM airbox, compared with the way BMW have provided the intake.
These aftermarket intakes also block about 20% of the intake area to the radiator (about 50% of the grille area, which is about 40% of the total intake area).
|
Exactly...plus, the exposed filers will collect all sorts of dirt and debris which, yes, restricts airflow.