Bully Dog Tuner with MTNTK Performance Tune for the 2015 - 2016 RZR 1000 XP. This tune raises the speed limiter to 85 MPH and rev limiters to 9000 RPM. The cooling fan now turns on at 199 and continues to run until 190 degrees. It also increases the smoothness of bottom end and engagement with tuning instead of clutching. The smoothness of power is dramatically increased for a more enjoyable ride.