Seller notes

Namura Top-End Repair Kit For POLARIS 350L TRAIL BOSS/2X4/4X4/6X6 1990-1994 STD Bore Bore Size: 79.95mm Size Over Standard: StandardIncludes pistons, rings and top end gasket sets (and needle bearings when needed)Machined smooth piston crown (unless otherwise noted) to reflect combustion heat while reducing carbon buildupHard anodized piston crown with a hardness of HRB 105MOS2 coating to draw heat through piston walls and out the bottomMinimized piston expansion and contractionPistons are more ...

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