My vote is Boondocker. They have the MOST experience, thr most resources and technology, and the number of Boondocker kits on the snows doubles the amount of all the other kits combined.......and there is a reason for that. I say this with alk respect, but this is only a "question" on the internet. I feel like all the other companies band wagon customers get on here to promote their kits,but get on the snow and the choice is very clear simply by the number of BD kits. BD owners dont need to come on here and talk up their kits to help sales....their kits sell themself. But lets take this a step further. The top RMSHA racers, Keith Curtis, Erin Bukelman, and Cole Wilford, ALL RUN BOONDOCKER TURBOS. Think that is a conincidence? Those guys wouldnt buy the 2nd, or 3rd best kit. Or take a look at your top back country riders, Chris Burandt, Dan Adams, Dan Gardiner, Matt Entz, Sahen Skinner....they ALL RIDE BOONDOCKERS TURBOS. Sorry but these examples alone prove and answer the answer to this question....you can try to argue it, but the proof is in the pudding...and the numbers. And just one more point, Carls Cycle and Vohk are arguably the top Polaris performance shops in the country...guess what, they run Boondockers. Pretty sure Jack Struthers and Eric Woog(Vohk) know a thing or two. Again, i mean no disrepect to any of the other turbo kits, they are nicely made, but this should clearly answer the question.