G Galexy Active OPE Member GoldMember Local time 2:56 AM User ID 12181 Joined Apr 6, 2020 Messages 19 Reaction score 11 Location Rogers, Arkanses Jun 7, 2024 #1 Hey everyone. I have a question. The piston of a 661 stihl the same as a 066
jacob j. Lord of Cargo Pants GoldMember Local time 12:56 AM User ID 232 Joined Dec 24, 2015 Messages 9,291 Reaction score 64,566 Location Coastal Oregon Jun 7, 2024 #2 No - different diameters and crown heights.