Putting on the freak is one of the most signifigant upgrades you can do from stock. I fiddled with the freak with both the side covers on and off. The bike definitely gets more air with the faux cleaners off. Since the stock airbox was underneath the seat and closed off from the sides. This meant no air flow was really going through the faux cleaners. Once you put the K&N's they could be directly affected be having the faux cleaners off or on. With them off, more airflow, more power. Plus with the faux's off, less weight. Not signifigant in itself but combined with removal of airbox and such every little bit helps. For every 100lbs of weight removed, its like gaining 10hp.
Fryguy
