The Polaris 850 with its huge 74mm stroke was just asking for a bigger bore and we have done our homework to bring you the 900cc Big Bore

keeping your machine right in the meat of the powerband for trail

Stock Original Cal: Restores your machine back to its standard factory tuning

Gains 3-4 peak horsepower

They are precision cut and molded to ensure the exact fit to your machine

Torque Link Pro Bundle for Polaris RZR Turbo R and Pro XP (Device, License, Cables) tools The Polaris 850 with itsComplete Polaris Turbo R & Pro XP (2021+) Tuning Bundle Includes everything you need to tune your machine: Device, Data Cable, and License! Shopping for a different vehicle? This is a pre packaged, all in one kit configured strictly for 2021+ Polaris Pro XP and all Polaris Turbo R models. Because this kit bypasses conditional setups, it will not fit other machines. If you have a Polaris Pro R (which requires a locked ECU bench unlock process), a 2020