Chasander Posted June 18, 2015 Share Posted June 18, 2015 Is there A difference between 63 and 65 GS mufflers. Maybe size? Link to comment Share on other sites More sharing options...
1965rivgs Posted June 18, 2015 Share Posted June 18, 2015 Yes, tailpipe stubs are larger on the GS muffler. Tom Mooney Link to comment Share on other sites More sharing options...
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