I just installed a snorkel your ATV snorkel kit on my 09 420. It works great, I believe the throttle response is better & helps a bit. Took me a few hours to install myself only because I came upon a slight problem. The kit that I received had one extra nipple & one extra 45° I could not make it fit for the life of me I couldn’t figure it out. So I called my brother to give me a hand & he seen the problem so once I pulled the extra nipple & 45 out. it fit like a glove once I done that. I don’t know if it is actually extra pieces but once I pulled them out it fit much better. Only problem is the plastic sticks out a bit but nothing I cant live with. Thought id share my experience with this kit shipping was pretty quick. So far I like it but instructions could have been better I kinda just looked at the pictures and put pieces together until it fit.