For Polaris 570 99mm Big Bore Cylinder Piston Gasket Kit RZR Ranger

  
The OEM standard cylinder bore is 99mm. This 99mm kit is a direct replacement size.

Precision dimensions: piston diameter 99.0mm (standard bore), piston rings 99mm set (2 compression rings + 1 oil ring), cylinder height 112.5mm, 10:1 compression ratio. The kit includes: 99mm cylinder block (aluminum alloy), 99mm piston (cast aluminum), piston rings, wrist pin, circlips, and full top-end gasket set (cylinder head gasket, base gasket). Replaces OEM part numbers: 3022860, 3023085, 3022295.

Aftermarket 104mm big bore kits are also available for increased displacement. Professional installation recommended for complete top-end rebuild - proper piston ring gap and torque specs required. Ideal for restoring lost compression, eliminating blow-by, reducing oil consumption, and refreshing top-end performance on Polaris 570cc ATV/UTV engines. Perfect for off-road trail riding, farm work, utility use, and engine rebuilding.