11-01-18, 12:29 AM 
		
	
	
		Don't have a Mighty Thou, only a Baby FZS 600. 
But I would have thought you would only lose the Exup valve if you changed the headers. :rolleyes
	
	
	
	
But I would have thought you would only lose the Exup valve if you changed the headers. :rolleyes

