A flow test is performed to measure airflow through a stock Mk7 GTI airbox with the snow grate removed and using a MST inlet hose and turbo inlet pipe. This is a variation of the MST/Stock setup that was compared with aftermarket intakes. The change in this case is the substitution of a stock air filter for the aFe filter.
Note: The stock filter is used.
The change from the aFe air filter to the stock air filter produces a drop in airflow from 383 CFM to 375 CFM.