NWP Big Bore Piston Assembly (56mm) for Stihl 066, MS 660 Chainsaws Review
Replacement piston assembly from NWP. Piston assembly includes a piston, rings, piston pin and circlips. These pistons have a thin coat of molybdenum on the piston which helps reduces friction and wear during initial break in period. The piston rings are ductile iron, so your chances of breaking them during installation are greatly reduced. Gaskets are sold separately. We recommend replacing your cylinder gaskets and using a piston ring clamp set to help when changing a piston. Fits 066/MS 660 chainsaws with Big Bore cylinder kits only. Made in Taiwan.Fits the following chainsaws:Stihl 066/MS 660 with Big Bore KitBore 56mmHeight 39mmHead Type FlatPiston Pin 12mm x 7mm x 33mmRings 56mm x 1.2mm Ductile Split GrooveCirclips 12mmCompression/Pin to top of Piston 15.25mmCompression/Pin Center to top of Piston 21.25mm
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