Sure did not make any difference on my bike. What I did notice, is that with the Tunnel Fillers installed, I no longer get sand and dirt in my radio buttons. Before the fillers, I was always picking sand out with a toothpick. Since the fillers, no problem.navyldo said:The air that comes up or through from the fork tube opening is vital to preventing the collapse of the riders "bubble". Blocking the air flow will dramatically increase the buffeting.