If you’ve ever ridden in a Polaris RZR, you know how ridiculous they can be once you put a few supporting mods on it. Now just imagine throwing a 300 horsepower, turbocharged Yamaha Apex snowmobile motor in it. That is exactly what the guys over at One Stop Performance did and I must say, this thing is an absolute animal. They build a variety of engines to take your machine to the next level, including a non-turbo version coming in at 150hp, or you can get the Hi-end version upwards of 700hp. Yes, 700 freakin’ horsepower. (video at bottom)