I have to agree with SalMaglie. The velocity stack would be nice if it was ABOVE the air filter, but when I first looked at my snorkle/filter, that rubber thing goes in about 2/3 the way and the bottom 3rd of my filter was dirty, and the rest was clean. So that tells me the inner snorkle restricts the flow by reducing the usable air filter area. I honestly don't know why Triumph did it this way. Maybe they thought it would help? One of my riding buddies who has a S3 and I talked about air box theory once. Some bikes have VERY specifically designed air boxes, in which case I think they are a good thing, but our bikes air boxes are an after thought... They are the size and shape they are simply because of the surrounding frame, etc, not because of airflow.
