The gas flow in modern cars is tuned from intake to tailpipe exit.

The odds are steep for modifying this system and coming out with a better result.

I see kids putting aftermarket intake systems on their cars - They may make more noise, but seldom more useful power.

I sometimes laugh at this because the intake in my '96 855R was in front of the radiator bulkhead and was only 2x4 inches. That engine had plenty of power.