The Ranger 900 is really lacking in the horsepower department compared to its RZR brother. Any performance modifications you do are somewhat masked by the fact that your throttle plate does not open up 100%. This varies between years, elevation, and other factors. No problem as we have the fix! We use the Bully Dog GT to flash our custom program into your ECU. This opens the throttle all the way, removes limiters, and allows you to rev the motor to where the power truly is. Clutching is needed with this program to get that power to the ground and our slip-on exhaust helps the motor really breathe. See the products below for more information.