This kit will fit a POLARIS RZR S 1000 HEAVY DUTY REVERSE CHAIN 2016+. This kit will fix your factory reverse chain problems. SOME MODELS WILL NEED A 67 TOOTH GEAR. COUNT THE TEETH. You can choose form a super single chain or dual chains. If you want the super single please leave it in a message. 
Image is a generic photo we use for our shaft kits. You will receive the shaft listed.

This listing comes with:
Shaft
2 chains or super single chain
sprocket

FITMENT:
  • Polaris RZR XP 1000 : 2014+
  • Polaris RZR XP 1000 High Lifter Edition : 2015+
  • Polaris RZR XP 1000 Trails & Rocks Edition : 2017+
  • Polaris RZR XP 4 1000 : 2014+
  • Polaris RZR XP 4 1000 High Lifter Edition : 2016+
  • Polaris RZR S 1000 : 2016-2020

Make sure you compare teeth count from the stock shaft to the heavy duty shaft.