So how do they work, do they stop any snow dust, or you more likely to suck some in, and do you you have a screen kit on your sled to help prevent snow dust from entering in under your hood. I would like to do something with my airbox but not to sure what to do. I raced a 00 zrt800 with the d&d breather on it and there wasn't much of a difference. The difference was how ever hooked up first. As far as mods i have v-force reeds and fine tuning to the clutchs but who doesn't do that 144 woodys, he has d&d breather, carbon tech reeds, ad bovion weight transfer kit 192 studs and fine tuning clutchs. We weigh the same +- 15lbs. So i would say that the d&d isn't worth it.