2015 POLARIS ACE 570. Polaris has a 570 version of their single seat UTV. The Ace offers up a 45 HP Pro Star engine in addition to their 32 HP version… It also has a 48″ overall width, for a tight and narrow feel on the trails (also handy for trails that restrict ATVs/UTVs to a 50″ width). $5695. 700 miles.