I just got my first rzr and I have a few questions. I live in Utah and I want to know the best clutch set up for 5000’+ altitude as well as the best ignition/ fuel system controller. I have four wheelers and these made a huge performance difference for them so I want to do the same for my new RZR. No motor mods, stock exhaust. Also, when I was shopping for this RZR I noticed a lot of machines for sale with rebuilt top ends and only two thousand or less miles on them. I read about a lot of issues with the air box. What is the best air filter set up for this new RZR?

Thanks for your input.