Not as much as it would without its Lower IC pipe. The stock FMIC is perfectly matched to the turbo, as it handles over 600CFM's, the stocker hist 550 completely maxed out. You may see 3-4WHP with a bigger FMIC, but it would also be inconsistant, IC pipes woule make a WAY bigger improvement over a bigger FMIC with a stock turbo, seen it time and time again on a dyno.