The below picture shows the difference in size between the stock-sized air filter (bottom) and the
larger version for the modified airbox.
The below pictures show the stock and modifed versions of the air filter, installed in the airbox.
|Stock Box showing Expansion Space
And, for comparison, here is the stock decorative "air scoop" compared to a carbon fiber variant
from Adrenalin Moto. Functionally the carbon fiber version looks trick, but it did not change/improve my engine