2 spi piston kits .020 over bore polaris 550 supersport trail rmk indy 73.50mm

Engineered to provide the best possible path for combustion chamber heat transfer to the cylinder wallsAll pistons, rings, pins and circlips are manufactured to OEM specificationsAll individual components are interchangeable with original partsPiston weight compatible with original pistonIncludes: 1 piston, 1 ring set, 1 wrist pin and 1 circlip set