Big Bore Complete Kit 1065cc / RZR XP1000 ('14+) Category_Default Category/SLED/Polaris/Pro-R 800 /Miscellaneous 3 different size set screws

3 different size set screws & tungsten slugs

No fuel changes normally required

We have upgraded our exhaust valve technology from a membrane bellow style actuator to a piston style actuator

1 lb/ft of torque gain

Big Bore Complete Kit 1065cc / RZR XP1000 ('14+) Category_Default Category/SLED/Polaris/Pro-R 800 /Miscellaneous 3 different size set screwsThis is the complete kit you need for over 140+ horsepower on pump gas! Looking for even more? You can go to our stage 2 big bore kit. Proven reliable and to have arm ripping power without having all the extra weight and extra components of a turbo. We have spent more time on the dyno than anyone in the industry to perfect our performance modifications. Our goal is the most power for the money, and we definitely deliver! This kit starts off by adding