With everything installed including a custom bracket, required pingle dual outlet fuel petcock, and the safety switches it'll be around 700 or so, but you can get the kit cheaper at many places if you're a manipulator. 700 for something that can add 25hp with the supplied jets is a much better deal than paying over 1200 for a stroker that won't even rev up nearly as quick. The strokers are nice for those who like to wheelie and lug the motor, but if you really haul balls everywhere go for the nos. You can add from a 10hp shot up in 5hp increments until 25hp with the jets they give you. If you use a 10hp shot that wouldn't be too dangerous to use on the wider orv routes. For hillclimbs it's a real treat, nos adds a shitton of torque and accelerates the quad just about as fast as you can shift. The best thing to do if you want to haul ass is just a very slight overbore (.02" over), 10.25 or up on compression, a race profile cam (greatly compliments nos by keeping the cylinder pressure down), and using a very good quality gasket. The 10.75 to 1 piston should use 98 octane fuel with a race cam, but you could use lower octane levels with the lower compression pistons out there. You shouldn't use the nos with stock compression, too low of compression makes it hard to ignite the fuel/nos combo. A aftermarket ignition with a higher spark energy is a definate plus, but again you want to prevent detonation by not advancing the timing much on it.