Vertex Forged Piston Kits are stronger and more durable replacement than OEM.Forged from 2618 aluminum with Molybdenum Disulphite coatingSuperior strength and durabilityLonger lifespanFaster break-inKit includes PistonsPiston ringsWrist pinCirclipsCompression Ratio: 11.0:1Cylinder Diameter: 93mmPiston Diameter: 92.950mmDisplacement: 1000ccFits PolarisRZR XP 1000 Premium (24-25)RZR XP 1000 Sport (24-26)RZR XP 1000 Ultimate (24-26)RZR XP 4 1000 Premium (24-25)RZR XP 4 1000 Sport (24-26)RZR XP 4 1000 Ultimate (24-26)RZR XP S 1000 Sport (26)RZR XP S 1000 Ultimate (26)RZR XP S 4 1000 Sport (26)RZR XP S 4 1000 Ultimate (26)XPEDITION ADV 5 Northstar [1000cc] (24-26)XPEDITION ADV 5 Premium [1000cc] (24)XPEDITION ADV 5 Ultimate [1000cc] (24-25)XPEDITION ADV Northstar [1000cc] (24-26)XPEDITION ADV Premium [1000cc] (24)XPEDITION ADV Ultimate [1000cc] (24-25)XPEDITION XP 5 Northstar [1000cc] (24-26)XPEDITION XP 5 Premium [1000cc] (24)XPEDITION XP 5 Ultimate [1000cc] (24-25)XPEDITION XP Northstar [1000cc] (24-26)XPEDITION XP Premium [1000cc] (24)XPEDITION XP Ultimate [1000cc] (24-25)