I think they made a special eddition R1 end can in titanium.  What colour is your silencer?  
 
Is it a normal carbon looking one, or is it a grey sort of colour? 
 
EDIT. Also, I'd suggest clamping it on, so it's easily removable. Cut a few small slits in the end, slide it over the other half of exhaust, and get a nice neat clamp. 
		
	
		
		
		
		
			
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My Build Diary -  http://davesroadster.blogspot.com/
*updated 7/6/11*
 
Best bit so far: Getting it running 
Worst bit so far:  Cutting steel for wishbones and engine mounts. 
Most annoying bit so far: Generator packing up half way through welding.
			  
		
		
		
		
	
		
		
	
	
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