I have a 2015 XP-4 1000 and I recently purchased a HCT tuned 2016 XP 1000 ECU. I installed it in my RZR and it seems to runs great. I was told it would need to be re-tuned for my 2015 since it’s set up for a 2016 (I called HCT). Does anyone know if it’s necessary for me to send it in for a “re-map”, or are the 2015 and 2016 ECU’s interchangeable?

Utah RZR Rentals