Polaris Ultimate Gear Reduction set (reduces high and low)This is by far our most commonly requested gear set so we decided to make a package kit out of it. We have upgraded the old "Ranger Low and Ace 325" gear kit with a new even lower gear set that includes the new Turbo R gear that is about 6% lower than the Ace gear set. The two and four seat model Turbo RZR models come from the factory with different High and Reverse gearing so this kit provides a different reduction for two seaters vs four seaters in