This isn't how a velocity stack is supposed to work. A velocity stack should be on the carb throat. It actually increases the velocity of airflow and improves the flow.
Putting one in the intake of the air box does neither of these. The air still has to travel the filter and all the of the snorkles/ difussers. Yo umay gain some HP, but it would be from removing a restriction (the inlet).
Looks cool, though.
