Whether you’re looking for more fun, to look cool, or just leave your friends in the dust. Then we have the product for you. You’re probably looking for more speed and power regardless of what model of RZR they have. MTNTK Performance has developed a new performance tune using the Bully Dog GT that reduces the restrictions in the ECU for a RZR 900 XC | S | Trail. The use of MTNTK Performance tune, using the Bully Dog GT, raises the speed limiter, the rev limiter, and has the ability to give you a more power. It also gives you better throttle response. Each tune is specific for your RZR 900 XC | S | Trail ECU. Fuel and timing adjustments are made to allow the best performance upgrade that is possible without making serious modifications or add special fuel. With the use of the Bully Dog GT you can tune your RZR 900, log your engine data, and monitor your performance. Monitor your RZR 900 XC | S | Trail performance in real time and eliminate the cost of a service appointment just to read a code. You can check the code yourself through the Bully Dog GT and determine what, if anything, is needed on your RZR 900 XC | S | Trail. This Bully Dog GT allows you to not only monitor your RZR’s performance, but also logs your engine data! It records 20 minutes of performance and gives you the option to playback the information that is relayed to your ECU when it is convenient for you. For the RZR 900 XC | S | Trail applications, the tuner comes with a preinstalled tune and is easy to update as upgrades become available. No hassle of sending in the Bully Dog GT to MTNTK Performance for updates. It has an SD card that can be updated from the comfort of your own computer by having MTNTK Performance email you a new tune when necessary.