Bill Cudney of Cudney Racing in Ontario reports the installation of TPI Low Boys into the new MX Z 800 REV airbox provides an increase of up to five horsepower. They run with the valves open down to about 10 F, close one off at that temp, and close off both valves at 20 F.[…]View Full Article

With the stock foam placed on top of the airbox, nobody knows they’re in there. – Snow Tech Magazine This is one of those ideas that is so simple you wonder why someone didn’t make them years ago. Once again, Thunder Products had developed a simple, yet effective product to improve your snowmobiling experience. Snowmobiles[…]View Full Article