Starting in early November, Yamaha will offer a Trail Supercharging Kit for any Yamaha FX Nytro, Nytro RTX, Nytro RTX SE, Nytro XTX from 2008 to 2011.

Developed by Mountain Performance Inc. (MPI), this supercharger requires no modification to the snowmobile and runs on premium unleaded gasoline. It bolts directly to the engine and works seamlessly with the fuel injection system components as well as the stock exhaust. More importantly, it provides instant throttle response and up to 45 extra horsepower.

The kit includes a tunnel-mounted auxiliary cooler, a set of accessory ice scratchers, and all the necessary clutch and gearing calibration components. It starts at $4,399.99 and comes with a one-year limited warranty.

Photo: Yamaha