Doesnt really matter. I'm not a Stihl guy but know an 066 will spank a 660.
The 660 Magnum dual port muffler
1122 140 0800 is the front cover
1122 140 0603 is the main body
Then there are the two screens and the screw for the cover screen
Is there not a specific yr for the designation change? That's all I was asking.
The 066 he has looks nearly new so I know it's at LEAST 10 yrs old then. THANKS! I don't mind reading/learning more either way!
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