Extended K&N Air Filter
 

 
The below picture shows the difference in size between the stock-sized air filter (bottom) and the larger version for the modified airbox.
 
 

1-Stockvsmodified.JPG

 
The below pictures show the stock and modifed versions of the air filter, installed in the airbox.
 
 

ExpansionSpace.jpg
Stock Box showing Expansion Space

3-enlargedopening.JPG

 
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 performance.
 
 

4-Adrenalinenlargedscoop.JPG

5-Adrenalinenlargedscoopside.JPG

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