Porca sextava M8 das motosserras STERWINS PCS1-40.3, STERWINS PCS1-45.3, STERWINS PCS2-27.3 25CC 30CM, STERWINS PCS2-35.3 37CC 35CM, STERWINS PCS2-40.3 40CC 40CM e STERWINS PCS2-45.3 45CC 45CM