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Replacement Muffler for Stihl models 066, MS660. Has dual ports for increased performance, complete with Spark Arrestors.
Replaces OEM: 1122 140 0603, 1122 140 0613
Note: Just because this part is listed for a certain model doesn’t mean it will fit every saw ever made with that model number, use the picture and OEM number to help determine if it is the correct part.