I got a brand new one sitting in the box I never opened it up yet for a cr500 I was going to run it on an N02 and was told that it would blow the head pipe off , so I had a over ride tranny cut . dont you quad guys run override tranys?
o-yeah and its fricken expencive I think I paid like $690 for it
I use the air shifter it works about the same for half the price. The only draw back is having to fill the air tank after each pass. I converted mine to CO2 and got about 12 passes and probably could have gotten a couple more having to fill it.