The scoops are suppose to increase a bit more air flowing into the snorkels and into the airbox.
I think the performance gains are negligible, and only at higher speeds.
__________________
'08 AW E90 335i
PROcede V5 | BMS DCI | RR DPs | ETS FMIC | FORGE DVs | Stett CP | Vanguard | PSS10
|